The punch list before the last payment: what to check on a DC rowhouse or condo sprinkler install before you release the final draw

The system passed its final inspection on Tuesday, the invoice for the last draw landed on Wednesday, and the contractor would like to be paid by Friday. This is the one week in the life of a sprinkler system when the owner holds all the cards, and most owners play none of them. They pay, the crew moves on, and the missing spare heads and the unlabeled valve turn into a service call a year later. Here is the walk we would do in our own house before the check goes out.

The inspection is not your punch list

The DOB inspector is checking the installed system against the code and the approved drawings. Head placement, pipe support, the hydrostatic test, the valve, the drain. That is the whole job, and the inspection article covers what trips it. Your contract promised things the inspector never looks at: the ceiling patched to match, white plates instead of chrome, a cabinet of spare heads, a set of drawings you get to keep, and somebody showing you where the shutoff is. A passed inspection means the system is legal. It does not mean the job is done.

Count the heads against the drawings

Take the approved drawing set to each floor and count. The number of heads on the sheet and the number of heads in the ceiling should match, and each one should be roughly where the sheet puts it. A head that moved a foot to clear a joist is normal and should be on the as built set. A head that is missing from a closet the sheet shows covered is not normal, and it is the kind of thing that passes an inspection on a busy afternoon. The rooms that can be skipped are a short list. If a room is not on it and has no head, ask.

Look at every head, up close

Stand under each one. The plate should sit flat to the ceiling with no gap. A concealed head’s cover should be clean, not caulked, not painted, not taped. A pendent head should hang straight with its deflector parallel to the ceiling and nothing within eighteen inches below it. In the kitchen, the head near the range should carry the intermediate temperature rating the drawings call for, and the bulb colors article tells you how to read that from the floor. Any head the painters touched is a replacement, not a wipe down, and it is the contractor’s replacement if the painters were theirs.

The riser

Go to the riser with the contractor and have them walk it. The control valve should be open and either locked open or wired to the alarm. The gauge should read a number that matches the flow test on the calc sheet within reason. The main drain should be piped to somewhere water can go, not to the middle of the cellar floor. Have them run the main drain test while you watch, and watch the gauge drop and recover, because the gauge and drain test is the one check you will do yourself from here on. Every valve gets a tag that says what it is. If your system has a flow switch, have them trip it and make sure the bell or the monitoring panel reacts.

The paperwork

Four documents, all of which exist by the time the system passes. The approved drawings and hydraulic calculation, stamped by DOB. The as built set, if anything moved. The contractor’s material and test certificate, which is the one page form the trade uses to record the hydrostatic test pressure, the duration, and who witnessed it. And the DOB record showing the permit closed, which you can pull yourself from the permit portal.Add the head cut sheets and the warranty with its start date. This stack is the handover file the next owner will ask for, and it is easier to collect now than in ten years.

The cabinet, the wrench, and the walk through

A spare head cabinet with at least one of each type installed, and the wrench that fits them, mounted near the riser. Residential heads are not stocked at the hardware store, and the cabinet is what turns a tripped head at nine at night into a half hour fix instead of a drained system until Monday. Then ten minutes of walk through, with whoever lives in the house present: where the valve is, how to tell it is open, what the alarm sounds like, who to call. Write the phone number on the riser tag.

The finish work

This is where most of the punch list lives. Every hole the pipe went through gets patched, and the patches in a rowhouse plaster ceiling should be sanded smooth, not left at the mud coat. Every penetration through a rated wall or a floor between units gets firestopped, and you should be able to see the red or orange sealant around the pipe. The exterior test drain, if there is one, should not point at the neighbor’s areaway. Debris gone, pipe scraps gone, the cellar floor swept. Walk it with a flashlight, because the cellar is where the shortcuts hide.

How to hold the money without a fight

Write the list on one page, date it, and give it to the contractor the same day as the walk. Items with a dollar value get a value. Anything that is a code item is not negotiable. Anything that is finish work gets a date. Then release the final draw minus the items still open, and pay the rest the day they close. Most contractors would rather clear a short list than argue about it, and the ones who argue are telling you something. The bid article explains why the contract should have named the last draw and what triggers it in the first place.

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