How to Compare Plumbing Contractor Bids for a Senior Day Center

The best bid is not necessarily the lowest number. A usable bid for a new private senior day center identifies every fixture, pipe run, valve, drain connection, test, allowance, and schedule assumption so the owner can compare the same work across every proposal. Comparing senior day center plumbing contractor bids line by line exposes omissions that can otherwise appear later as added cost or delayed opening work.

Start with the building information already available: plans, fixture schedules, equipment cut sheets, utility information, and a room-by-room list of sinks, toilets, showers, janitor closets, kitchen equipment, laundry equipment, and water heaters. A multi location senior center plumbing asset register can also provide a useful format for naming valves, water heaters, pumps, backflow assemblies, and shutoffs consistently before the project begins.

Put Senior Day Center Plumbing Contractor Bids on One Scope Sheet

Build a comparison sheet before choosing a contractor. Give each bidder the same scope questions and require a yes, no, quantity, or dollar response rather than accepting broad phrases such as “per plans.” This is also where early wording can prevent later senior center plumbing change order disputes, especially when existing piping, utility capacity, and demolition limits are unclear.

List every plumbing area separately. A small center may have two public toilet rooms, one staff toilet room, a janitor sink, a break-room sink, a kitchen hand sink, a three-compartment sink, a mop sink, and one or two accessible shower rooms. If a bid says “provide complete plumbing” but does not show fixture counts, ask the bidder to list the exact number of water closets, lavatories, floor drains, hose connections, grease-related equipment connections, and drinking-water fixtures included.

Separate new work from reuse work. A proposal should identify whether it includes tying into an existing 2-inch water line, replacing it with a 3-inch line, adding isolation valves, rerouting sanitary piping above a ceiling, or leaving existing branches untouched. Those choices can produce very different prices, and they also affect how much ceiling, wall, or slab work belongs in the plumbing number.

Check Water, Drainage, Hot Water, and Equipment Assumptions

Ask each bidder to state the assumed incoming water pressure, available pipe size, and location of the connection point. A bid based on 55 psi at the street connection is not equivalent to one based on 35 psi at an interior branch with several floors or long pipe runs between the meter and fixtures. The proposal should also say whether a pressure-reducing valve, booster equipment, expansion tank, or water hammer arrestors are included.

Hot-water scope needs the same level of detail. Compare the proposed water-heater capacity in gallons, recovery rate, fuel or electrical requirement, recirculation pump, return piping, balancing valves, mixing valve, and insulation. A bid that includes a 75-gallon heater but omits a recirculation loop may look less expensive than one that includes both, even though the daily experience at distant sinks and showers will differ.

Drainage proposals should show more than pipe diameters. Look for floor drains, cleanouts, vent piping, trap primers where specified, condensate drainage, and connections for ice makers, dishwashers, laundry equipment, or commercial kitchen equipment. A useful home check without tools is to open a hot tap for about 30 seconds while another fixture is running; obvious temperature swings show why a bid should explain mixing and recirculation rather than merely naming a water heater.

Compare Labor, Demolition, Testing, and Schedule Instead of One Total

Require the price to be divided into labor, materials, equipment, demolition, patching assumptions, and allowances. A contractor may include removal of 40 feet of old cast-iron drain pipe while another assumes the existing line remains usable. Neither number can be evaluated fairly until the assumption is written beside the price.

Testing and closeout work deserve their own rows on the comparison sheet. Ask whether the bid includes pressure testing of domestic water piping, drainage testing, flushing, cleaning strainers, labeling shutoff valves, balancing hot-water recirculation, startup support, and a final fixture walk-through. A proposal that lists an 80 psi water test for two hours gives the owner a concrete item to compare, while “test system” leaves the method unanswered.

Schedule should include more than a completion date. Ask for the number of working days after notice to proceed, the expected duration of underground rough-in, above-ceiling rough-in, fixture trim, equipment connection, and testing. For example, a 12-week plumbing schedule may be workable if fixture trim begins after walls and ceilings are ready, but it may not be workable if the bid assumes unrestricted access to every room for all 12 weeks.

Score Clarifications, Allowances, and the Contractor’s Written Plan

Use a simple weighted score after confirming that each bid covers the same scope. Price can be one category, but completeness, schedule, staffing, identified exclusions, proposed equipment, and clarity of answers should each have a separate score. A bid with 18 listed exclusions may still be usable, but only after each exclusion is assigned to another contractor, another trade, or the owner’s budget.

Pay close attention to allowances because they are placeholders, not fixed prices. If one proposal carries a $3,000 allowance for a water-heater connection and another carries $8,000, ask what labor, valves, controls, electrical coordination, venting, pads, and piping are included in each figure. Select a contractor after the remaining allowances are narrowed into described work items, and retain the final scope sheet with the signed proposal so later questions can be checked against the same document.