Sump Pump Replacement Quote Checklist

The basement is dry when the plumber arrives.

The homeowner says the sump pump ran through last night's storm, started making a hard clunk, and then stopped. The label says one-third horsepower. A second contractor has already texted a price for “same-size pump plus battery backup.”

That is not yet a replacement scope.

The failed part may be the pump, float, check valve, power supply, blocked intake, frozen outlet, undersized pit, or discharge route that sends water back toward the foundation. A new pump can also move less water than the old one at the system's actual total head, even when the horsepower printed on the box looks larger.

A defensible quote connects four records:

1. a plumbing inspection report that explains what was observed and what could not be tested;
2. a site assessment checklist that maps the pit, power, pipe, outlet, grade, and access;
3. a plumbing quote or plumbing proposal that defines the selected primary pump, backup option, discharge work, assumptions, and price; and
4. a plumbing work order and service report that carry the approved design into installation, testing, and handoff.

The quote should not promise that a particular motor will “prevent basement flooding.” It should say what failure modes the proposed system is designed to address, how the equipment was selected, where the water will go, what has not been corrected, and what the owner is expected to monitor and test after handoff according to the selected manufacturers' instructions.

Diagnose the system before pricing a pump

“Pump does not work” is a symptom, not a diagnosis.

Start by recording what happened:

• date, weather, and whether the event followed rain, snowmelt, plumbing leakage, or an unknown source;
• highest water level observed and whether water left the pit;
• whether the primary pump ran continuously, cycled rapidly, hummed, tripped a breaker, stopped silently, or never received a call to run;
• whether an alarm sounded or a backup pump operated;
• whether the discharge outlet was visible and flowing;
• any prior pump, float, check-valve, battery, charger, or piping work;
• any basement water, damaged contents, wet electrical equipment, or unsafe access; and
• whether the system is currently protecting the building or needs temporary pumping, a safe shutdown, or a written risk notice until permanent work is completed.

Do not energize or unplug equipment, reach into the pit, or handle components in standing water until the electrical hazard is controlled and the person doing the work is qualified for the task. OSHA says plumbing service work is generally covered by its general-industry rules, while some construction work falls under the construction rules. For general-industry work, 29 CFR 1910.333 generally requires exposed live parts to be de-energized before employees work on or near them, subject to its stated exceptions and qualified-person controls. For construction work, 29 CFR 1926.416 requires protection from contact by de-energizing and grounding the circuit or guarding it effectively. When a flooded basement call requires immediate control before a full replacement quote, use an emergency plumbing work order to separate the safe temporary action from the permanent repair.

Inspect the complete path, not only the pump:

The 2024 International Plumbing Code definition describes a sump pump as an automatic electric pump that removes drainage other than raw sewage from a pit or low point. That distinction matters. If the basin receives toilet waste or other sewage, stop treating it as an ordinary clear-water sump replacement and evaluate the sewage-pump, sealed-basin, venting, discharge, alarm, and code requirements that actually apply.

The site-visit estimate workflow is useful here: photograph the existing condition, measure what controls the price, identify what must be verified, and do not convert an inaccessible condition into an invented assumption.

Size the pump against flow and head, not the old horsepower label

The model code gives the right starting principle. Section 1113.1.1 of the 2024 IPC calls for pump capacity and head appropriate to the anticipated use.

That is not the same as replacing one-third horsepower with one-third horsepower.

The Hydraulic Institute explains that a pump curve shows how much head a specific model produces at different flow rates. Its system-curve guidance separates static head—the elevation and pressure difference between the water source and destination—from friction losses in the pipe, fittings, and valves at a given flow. The selected pump's actual operating point comes from the interaction between the pump curve and that system curve.

A quote file should therefore record:

• the required or estimated inflow rate and how it was established;
• static elevation from the operating water level to the discharge destination and any pressure difference at that destination, with the route's high point and any manufacturer-specific limit noted separately;
• discharge-pipe material and inside diameter;
• approximate developed length;
• elbows, check valves, branches, reductions, and other material restrictions;
• final discharge condition;
• the proposed pump's published flow at the estimated total head;
• motor voltage and current data needed for the electrical review;
• minimum and maximum operating levels allowed by the pit and float; and
• any selection margin, unresolved condition, or manufacturer restriction.

Measure inflow when conditions allow

The old motor size does not tell you how much water enters the pit.

When it can be done safely and without exposing the building to water damage, a technician may estimate inflow from the pit's known dimensions and the timed rise between two marked levels while the pump is off. Historical cycling during a representative wet event can provide another data point when the pit volume, on/off levels, and timing are documented.

Do not call a dry-day bucket test the building's peak groundwater rate. Do not simulate a test that could overflow the pit. If the relevant storm condition cannot be observed, label the inflow basis:

Selection basis: Proposed pump is selected from measured pit geometry, approximately [vertical lift and any discharge pressure], [pipe size/material], [developed length and fittings], existing wet-weather history reported by owner, and the manufacturer's published performance curve. Peak inflow was not directly measured during this visit. Quote includes the commissioning test described below but does not represent that the system can control every rainfall, groundwater, surface-flood, sewer-backup, pipe-blockage, or power-loss condition.

That is more useful than “heavy-duty pump.”

Record the curve point you are buying

The Hydraulic Institute's pump-curve reference plots head against flow for a specific pump. Put the selected duty point in the job file instead of relying on a retail maximum-flow number measured at little or no lift.

If the existing pump kept up only by running continuously, a like-for-like replacement may preserve a capacity problem. If it short-cycled every few seconds, a larger motor may make the cycling worse when the pit or float range is the real constraint.

Make the discharge route a priced part of the job

A sump pump is only as useful as its outlet.

The quote should trace water from the pump discharge tapping to the final approved location. Include the interior pipe, check valve, union or service connection, supports, wall penetration, exterior transition, freeze protection, surface or underground run, outlet protection, erosion control, and restoration that are actually in the price.

Section 1113.1.4 of the 2024 IPC requires model-code discharge piping to meet Section 1102.2, 1102.3, or 1102.4, be at least as large as the pump discharge tapping, and include a gate valve plus a full-flow check valve. For one- and two-family dwellings, its exception removes the gate-valve requirement but still requires a check valve on the pump or ejector discharge. The adopted local code, amendments, manufacturer instructions, and authority having jurisdiction still control the actual project.

A check valve limits water in the discharge pipe from falling back into the pit after the pump stops. It does not legalize the outlet, prevent an exterior line from freezing, or fix a route that returns water to the foundation.

Do not assume the sanitary sewer is an approved outlet

Local discharge rules vary, and the quote has to be local.

The City and County of Denver's homeowner runoff guide tells owners not to connect groundwater sump discharge to the sanitary sewer. It also explains that an otherwise acceptable surface discharge can still become a nuisance when it creates standing water, ice, or flow onto adjacent property or the public right-of-way.

Minneapolis's regulatory guidance says its code requires direct sump pump drainage to be disconnected from the sanitary sewer. The city's home sewer maintenance guidance likewise tells property owners to correct sump pumps connected directly to the sanitary sewer.

These are local examples, not a national outlet rule.

Before promising a route, record:

1. the authority or utility consulted;
2. the approved disposal point;
3. permit, inspection, easement, right-of-way, or utility requirements;
4. distance and grade away from the foundation;
5. neighbor, sidewalk, driveway, landscaping, erosion, and icing effects;
6. pipe burial, slope, cleanout, freeze, and termination details;
7. whether a storm connection, dry well, daylight outlet, swale, or other system needs separate design or approval; and
8. who repairs lawn, pavement, siding, insulation, drywall, or other finishes.

Use direct scope language:

Discharge price includes replacement from the primary pump through a new [size and material] interior line, full-flow check valve, serviceable connection, specified supports, existing wall penetration, and [described exterior route] terminating at [approved location]. Price assumes the authority accepts that point and the route can maintain the stated slope and cover. Sanitary-sewer connection, storm-sewer tap, right-of-way work, dry-well design, excavation beyond [limits], concealed-pipe replacement, drainage engineering, and surface restoration other than [listed work] are excluded unless added in writing.

If the outlet is buried and unverified, say so. The hidden-conditions workflow applies just as much to a blocked underground discharge as it does to rot behind a wall.

Define what the backup is supposed to cover

“Battery backup included” is incomplete.

A backup design should name the failure it addresses:

FEMA's flood-mitigation guide for homeowners recommends battery-operated backup for a sump pump because electrical power can fail during a flood event. FEMA's separate basement-backup fact sheet also identifies a secondary pump, check valves or backflow protection, and water sensors as resilience measures.

That guidance supports offering backup. It does not support an unlimited performance promise.

FEMA's urban flooding guidance warns that ordinary sump pumps may not handle large water volumes and do not operate through an outage without battery storage or generator support. A quote should distinguish ordinary groundwater seepage from surface floodwater, sewer backup, a failed wall or window opening, and inflow beyond the system's design.

A backup pump needs its own fit and flow check

The backup pump has a curve, switch level, check valve, power source, and installation geometry of its own.

The 2025 Liberty Pumps Model 441 installation manual is a useful product-specific example. It requires a check valve on the primary discharge, locates the backup float above the primary activation level, describes shared and separate discharge arrangements, and instructs the installer to verify float sequence and unobstructed travel. The manual calls its separate-discharge layout the most fail-safe of its three methods, but that layout is relevant only where the pit and an approved second outlet can accommodate it.

Do not copy those details into a different brand's scope. Attach the instructions for the exact selected pump, battery, charger, controller, check valves, and alarm.

The quote should state:

• exact backup pump and controller;
• accepted battery type, size, and whether the battery is included;
• charger rating and required receptacle/circuit;
• expected performance at the estimated head;
• primary and backup activation levels;
• shared or independent check valves and discharge routes;
• alarm conditions and how the alarm is heard or transmitted;
• included remote notification, if any;
• startup charge and commissioning prerequisites;
• test and maintenance interval from the selected instructions; and
• who replaces and disposes of the battery.

Do not sell a runtime such as “24 hours” without the test basis. A battery system may sit idle for many hours but run the pump for a much shorter cumulative time. The installed battery, head, gallons per cycle, cycle frequency, temperature, age, and charging condition all affect the result.

Treat generator language as electrical scope

If the customer wants generator support, connect the plumbing quote to an actual electrical quote for the generator system. Record the pump's voltage and starting demand, the selected circuit, the proposed connection or transfer method, other simultaneous loads, and test responsibility.

Do not tell a homeowner to improvise a basement extension-cord setup during a storm. The U.S. Consumer Product Safety Commission says portable generators must be used outdoors, far from the home, and never in a house, garage, basement, crawlspace, shed, or near an opening. The connection method still needs to be part of the reviewed plan; any generator inlet, new circuit, receptacle, panel, or transfer work belongs in a qualified electrical scope. If the site review reveals broader service work, use the panel-upgrade quote workflow rather than hiding it inside a plumbing allowance.

Build the replacement quote in six layers

An itemized total helps the customer see the difference between a pump swap and a resilience upgrade.

1. Inspection and selection

State whether the price includes:

• service-call or diagnostic charge;
• water-source and pit inspection;
• inflow observation or measurement;
• discharge measurement and head calculation;
• pump-curve selection record;
• electrical visual observations versus electrical testing by a qualified trade;
• permit and code research;
• alternate pricing; and
• design, drainage, or engineering services that are not included.

A written quote record should carry the exact model and selection basis, not a verbal promise that the installer will choose “whatever fits” on installation day.

2. Primary pump and pit work

List:

• pump manufacturer, model, material, voltage, switch type, and discharge size;
• removal and disposal of the existing pump;
• pit cleaning limits;
• pump base, stand, or support;
• float location and required clearance;
• cover modification or replacement;
• inlet changes;
• fasteners, fittings, and service connection;
• work excluded when the pit is damaged, too small, inaccessible, or receives the wrong waste stream.

Do not promise a two-pump layout until both pumps, floats, check valves, pipes, battery box, cover, and service access have been laid out against the actual pit.

3. Discharge piping

Break out:

• interior pipe and fittings;
• check valve for each required path;
• isolation valve when required;
• union or removable connection;
• pipe supports and vibration/noise treatment;
• wall or rim-joist penetration;
• air sealing, weather sealing, and fire-resistance work where applicable;
• exterior transition;
• freeze protection;
• surface or underground route;
• final outlet and erosion control;
• excavation and restoration.

If replacing only the interior pipe, say exactly where responsibility stops.

4. Backup, alarm, and electrical coordination

Identify:

• backup pump, controller, charger, and battery;
• high-water alarm and notification method;
• separate or shared discharge;
• receptacle and circuit assumptions;
• electrical work by the plumber, electrician, owner, or others;
• standby-power interface;
• monitoring subscription, network, or cellular requirements;
• initial setup and owner contacts; and
• excluded troubleshooting of existing circuits, panels, generators, Wi-Fi, or remote services.

The customer should be able to see whether “backup” means a second pump, a battery system, an alarm, generator compatibility, or a combination.

5. Permit, access, and restoration

Name:

• contractor license and permit responsibility;
• application and inspection fees;
• working hours and customer preparation;
• removal of shelves, enclosures, finished flooring, or stored property;
• asbestos, lead, mold, contaminated water, or other specialty conditions;
• excavation, utility locating, and landscaping;
• drywall, insulation, trim, paint, masonry, concrete, and exterior finish restoration; and
• cleanup and removed-equipment disposal.

Do not state that “no permit is required” from habit. Verify the project location, adopted code, type of work, electrical changes, discharge connection, and authority instructions.

6. Commissioning and closeout

Include the test record, photos, owner training, manuals, warranty documents, permit sign-off when applicable, maintenance schedule, and invoice closeout.

Use a completion certificate for the finished scope and exceptions. If the customer declined a backup, outlet correction, alarm, battery, electrical correction, or restoration item, record the decision without turning it into a waiver of work the contractor was legally required to perform.

Offer options that change real scope

Good-better-best pricing is useful only when the differences are visible.

Do not make the base option knowingly noncompliant or unsafe so the next tier looks attractive. Options can change redundancy, monitoring, restoration, equipment grade, or included corrections; required code work remains required.

Write the change gates before installation

Sump replacements uncover hidden conditions at the worst possible time: after the old pump has been disconnected.

State when work will stop for written approval:

• water enters faster than temporary control can safely manage;
• the pit contains sewage, contaminated water, or an unidentified waste stream;
• the basin is cracked, unstable, too small, or configured differently from the visible condition;
• the existing pipe is blocked, reduced, broken, back-pitched, frozen, concealed, or routed somewhere other than represented;
• the outlet is prohibited or creates an unacceptable nuisance;
• the receptacle, circuit, grounding, GFCI protection, wiring, or panel condition requires electrical correction;
• the selected pumps and floats cannot operate independently in the existing pit;
• excavation, structural, fire-resistance, hazardous-material, or restoration work changes;
• permit or inspection requirements differ from the stated basis; or
• the owner requests a different pump, backup, monitoring, or outlet after approval.

Use a change order before added work proceeds. The signed-change-order guide explains why a wet basement is not a reason to erase the approval trail; emergency control and permanent added scope can still be documented separately.

Commission the system with water, not only a switch lift

An installation is not proven because the motor makes noise.

The service report should record:

1. pit condition after cleaning and installation;
2. primary pump on and off levels;
3. observed or measured primary discharge through the complete path;
4. leaks, vibration, noise, pipe movement, and check-valve operation;
5. exterior outlet flow and drainage away from the building;
6. backup activation with the primary unavailable, using the selected manufacturer's safe test method;
7. backup flow, check-valve operation, and alarm behavior;
8. restoration of normal power and controller status;
9. charger and battery status after testing;
10. high-water or remote-notification test;
11. several automatic cycles when required by the instructions; and
12. unresolved exceptions or owner-declined work.

Photograph the nameplates, pit layout, floats at their installed heights, check valves, service connections, pipe supports, circuit labels, controller status, battery label, wall penetration, exterior route, outlet, and final test. If the controller or remote-monitoring screen is included, keep passwords, access codes, and account identifiers out of the photos. The work-order photo guide helps keep those images tied to a job number and caption rather than loose in a technician's phone.

The Model 441 manual, for example, instructs the installer to run water through several cycles and verify all components after assembly. Use the procedure for the installed equipment; do not substitute an improvised test for the manufacturer's commissioning steps.

Separate product warranty from flood protection

A warranty section should answer:

• who warrants the primary pump and for how long;
• who warrants the backup pump, controller, charger, battery, alarm, check valves, and other accessories;
• whether registration, proof of purchase, or maintenance records are required;
• what installation labor and return visits the contractor covers;
• when diagnostic, removal, shipping, battery, excavation, restoration, after-hours, or consequential costs are excluded;
• whether an owner-supplied component changes labor or product coverage;
• how the customer starts a claim; and
• what records the customer must keep.

Use the manufacturer-versus-contractor warranty workflow and issue the actual warranty record. Do not turn “three-year pump warranty” into a promise to pay for any future basement water.

A careful boundary can read:

Warranty covers the listed product and contractor workmanship only as stated in the attached warranty record. It does not represent that the system will prevent water entry or property damage under every inflow, flood, surface-water, sewer-backup, blocked or frozen discharge, power, battery, maintenance, alarm-response, building, or weather condition. Manufacturer coverage, contractor labor coverage, batteries, monitoring services, and excluded restoration are identified separately.

Review the language against applicable state law and the actual written warranties. A disclaimer cannot erase a required duty or excuse defective work.

Hand the owner a maintenance decision, not a pile of manuals

At closeout, show the owner:

• which breaker and receptacle serve each component;
• what normal controller lights and alarm states look like;
• how to respond when the primary runs continuously, the backup runs, or the high-water alarm sounds;
• where the water should appear outside;
• how to check for ice, blockage, erosion, or water returning toward the building;
• the safe test method and interval from each selected manufacturer;
• battery type, installation date, test procedure, replacement criteria, and disposal path;
• who receives remote alerts and what happens if internet or cellular service fails;
• who to call for plumbing, electrical, drainage, monitoring, or warranty service; and
• what conditions require immediate action rather than waiting for routine service.

The Liberty manual cited below instructs owners of that system to inspect and test the pump, charger, and battery monthly. That is product-specific guidance, not a universal interval for every system. Put the selected manuals' real schedule into the owner-training handoff, and leave the owner with one dated test log.

A compact sump pump replacement scope

Primary system: Remove and dispose of the existing [model/condition]. Furnish and install [exact pump and switch] selected for the attached system basis of [estimated flow/head]. Install [pipe, service connection, full-flow check valve, supports, and cover work]. Reuse is limited to the verified [pit, receptacle, pipe segment, penetration, and exterior route].

Backup and alarm: Furnish and install [exact backup pump, battery, charger/controller, check valves, piping arrangement, and alarm]. Primary and backup activation levels will be set to the selected manufacturer's instructions and verified through automatic water testing. Estimated performance and battery limits are shown on the attached selection sheet; no fixed outage runtime is promised beyond that documented basis.

Discharge: Route to [approved termination] using [size/material/path]. Quote includes [excavation, penetration, sealing, freeze detail, erosion control, and restoration]. Sanitary connection, storm tap, right-of-way work, dry-well design, concealed obstruction, and unlisted restoration are excluded.

Closeout: Provide startup readings, cycle and alarm test, discharge photos, permit/inspection record if included, manuals, warranty documents, maintenance schedule, and owner acknowledgment. Conditions outside the listed assumptions will stop for safe temporary control and written change authorization.

That paragraph is not the whole contract. It is the center of a quote that lets the customer see what the price actually protects.

Sources

• International Code Council, 2024 International Plumbing Code, Section 202: Definitions and Chapter 11: Storm Drainage, especially Sections 1113.1.1 and 1113.1.4, accessed July 24, 2026. The IPC is a model code; local adoption and amendments control.
• Hydraulic Institute, Pump Curves and Pump System Curves, both last updated July 19, 2024; accessed July 24, 2026.
• Federal Emergency Management Agency, Protect Your Home From Flooding, accessed July 24, 2026.
• Federal Emergency Management Agency, Building Codes and Basement Backup, September 2023; accessed July 24, 2026.
• Federal Emergency Management Agency, Urban Flooding: Guidance for Homeowners and Renters, accessed July 24, 2026.
• City and County of Denver, Homeowner's Guide to Rainfall, Runoff, and Groundwater, accessed July 24, 2026.
• City of Minneapolis Public Works, Regulatory Controls and Enforcement, last updated February 10, 2026; accessed July 24, 2026.
• City of Minneapolis Public Works, Home Sewer Maintenance, last updated December 9, 2025; accessed July 24, 2026.
• Liberty Pumps, Model 441 12-Volt Emergency Sump Pump System Installation Manual, document 4414000F, 2025; accessed July 24, 2026. Product-specific example only.
• Occupational Safety and Health Administration, Service Workers in the Heating, Plumbing and Air-Conditioning Industries, July 8, 1997, for the boundary between general-industry service work and construction work.
• Occupational Safety and Health Administration, 29 CFR 1910.333, Selection and Use of Work Practices, and 29 CFR 1926.416, General Requirements, accessed July 24, 2026, for employee protection from electrical hazards under the applicable standard.
• U.S. Consumer Product Safety Commission, Generators and Engine-Driven Tools, accessed July 24, 2026.

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This article is general information, not project-specific plumbing, electrical, engineering, code, legal, or warranty advice. Verify the locally adopted codes and amendments, discharge rules, permits, manufacturer instructions, licensing requirements, and warranty terms with the relevant authorities and qualified trades before work begins.