How to Write a Commercial Plumbing RFP That Gets You Accurate Bids and a Reliable Partner

A plumbing RFP decides most of what you’ll pay a plumber for the next year or two, before anyone’s touched a pipe. How much detail goes into it shapes the price, the service, and how often you end up on the phone arguing with the vendor.

The founder of ClearFM says this a lot: accountability has to be structural. Write a fuzzy request and you get fuzzy bids back, then a fight on the first service call. Write a precise one and every bidder is pricing the same job, so the lowest honest number is easy to pick out. Easier, anyway.

Penny Llaban, a plumber with Mario Brothers Plumbing, is on the other end of these documents. She reads them and has to put a bid together based on the information in the RFP. What she says lines up closely with what good procurement teams already do. The buildings that get the best plumbing service tend to be the ones whose RFPs say what’s really going on in the building.

So, what goes in.

Start With the Building’s Actual Plumbing Situation

Plumbers price risk. If your RFP doesn’t describe the system, a bidder has two options. Pad the number to cover whatever they can’t see, or bid low and make it back later on change orders. You pay either way. The second one just takes longer to show up.

Llaban puts it plainly:

“It’s hard to give an accurate estimate for plumbing work without knowing specifics about the plumbing system. I can only give an accurate quote for what I know.”

Include these details in every plumbing RFP:

• Building age and number of floors

• Pipe materials: copper, galvanized steel, PEX, cast iron

• Water heating setup: individual water heaters or a central boiler

• Problem history: stacks that have failed before, recurring backups, chronic slow drains

Admitting a stack has failed twice feels like giving something away in a negotiation. It actually helps you. The bidder who knows about it prices the real job, shows up with the right gear, and doesn’t act surprised once they open things up.

Replace “Plumbing Maintenance” With a Defined Scope

“Plumbing maintenance” shows up in RFPs all the time and tells a bidder close to nothing. Each provider fills in the blanks their own way, so the bids that come back are for different jobs, even if they look like the same job on paper.

“Is the scope drain cleaning or drain cleaning with hydro jetting? How much line is included with the service, and are we just cleaning out the line or making repairs as well? The more detailed the scope of work in the RFP, the easier it is to provide an accurate bid and avoid disagreements about additional costs later.”

Spell out the specifics:

• The exact services included: drain cleaning, hydro jetting, fixture work, inspections

• How much line each service covers

• Whether repairs are included or quoted separately

• Whether fixture cleaning, repair, or replacement falls inside the contract

• Which responsibilities belong to the tenant and which belong to the building owner

Tenant versus owner responsibility gets its own line. Maybe more than one. Leave it out and you’re debating on the first call whether the backed-up sink in suite 400 is covered or extra. Write it down and someone just checks the contract.

State Access Hours and Site Conditions

Timing changes the price. Business hours, after hours, and weekends all have different labor rates, and if one bidder assumes Tuesday mornings and another assumes Saturday nights, you can’t compare the two bids at all.

“By noting in the RFP when access will be provided for work, CREs can even the playing field for all service providers.”

The clock is only part of it. Physical access matters about as much:

• Locked mechanical rooms and who holds the keys

• Tenant spaces that require coordination or advance notice

• Roof drains that need a lift to reach

• Any restrictions on noise, water use, or work hours

Llaban suggests asking bidders to say in their proposals how they’ll handle access that goes sideways, like a tenant who isn’t there when the plumber shows up. Small question. But it makes everyone price the same headache, which keeps the comparison fair.

Put Compliance Requirements in the RFP, Before the Award

Licensing, insurance minimums, prevailing wage. All of it changes a bid. Bring any of it up after the contract’s signed and the numbers move, and the work gets pushed back.

Put every requirement in the RFP itself and ask for written verification: licenses, certificates, insurance paperwork. Then everyone’s bidding under the same rules, and you skip a whole round of renegotiating after the award.

The founder of ClearFM treats this as a design choice. If both sides see the full terms before they commit, the deal tends to hold up. If something shows up late, somebody eats a cost they didn’t plan for, and it usually comes back as worse service or a vendor who’s slower to pick up the phone. Hard to say when. It just usually does.

Build the Vendor Agreement as a Dispute Prevention Tool

The contract after the RFP needs the same care. Three areas carry most of it, and the first one’s the one that bites.

Exclusions and Additional Cost Items

Ask vendors to list their common exclusions in writing. Slab leaks, camera inspections, repairs over a set dollar amount that need their own quote. Slab leaks especially, since they’re expensive and neither side wants to own one. Then write down what the contract price does cover. Llaban says this keeps everyone on the same page and cuts down on finger-pointing later.

Tenant Notifications and Water Shutoffs

Shutting off water in a commercial building is a big deal for tenants, so agree on how it works ahead of time. Define:

• Who communicates with tenants, through what channel, and with how much notice

• Days and times when shutoffs are prohibited

• The maximum duration water can stay off

• Who approves a shutoff and how that approval happens

Rate Sheets and Markups

The price in the RFP covers one situation. After-hours calls, emergencies, parts, and materials are all priced differently.

“I recommend that CREs request a full rate sheet and attach it to the contract for clarification.”

Attach the full rate sheet to the agreement, with after-hours labor, emergency labor, and the markup on parts and materials. Then when an invoice comes in, you can check the math.

Three Questions That Reveal How a Vendor Actually Operates

1. Who responds to emergencies, and what does “response time” mean. Ask about average response times for after-hours calls, who covers your location, and what happens when the first available plumber is running behind. Then pin down whether the response time means a callback, a dispatch, or a plumber standing in your building. Very different promises. Get it in writing before the award.

2. Do you inspect drains with a camera. Cabling a drain clears the clog. A camera shows why it clogged: a broken pipe, a sagging line, roots sometimes. For buildings with repeat backups, put in the contract when a camera inspection happens and how you’ll get the results. The answer tells you whether this vendor is going to find the problem or keep coming back to clear it.

3. How are recurring problems handled. If a main drain stack backs up three times, the agreement should state whether the vendor treats each event as a fresh service call or investigates the root cause. Ask whether follow-up inspections and diagnostic work on recurring issues fall inside the original price or get billed separately. Llaban recommends documenting this in the RFP or contract so expectations stay clear on both sides.

Also ask who your account representative will be, when a licensed plumber is required on site, and how that determination gets made.

Who a Complete RFP Protects

Your budget, first. The bids line up and the costs are predictable. It also protects the plumber, who gets to price the real work instead of guessing. That second part gets less attention than it should. A vendor stuck with a job they underbid because the RFP left something out tends to start cutting corners somewhere. Can’t really blame them.

ClearFM built its platform around the idea that both sides should be able to see the whole deal. Clear scopes, written rates, accountability built into the process. Vendor relationships last longer that way.

Before the next plumbing RFP goes out, picture handing it to a qualified plumber who’s never been in the building. Could they price the actual job from it? If yes, send it.