The Plumbing Questions Nobody Asks Until After Closing on a Brooklyn House
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By PAGE Editor
A home inspection in Brooklyn takes about three hours. The inspector runs every faucet, flushes every toilet, reads the water heater's age off the serial number, and delivers a forty-page report calling the plumbing "functional at time of inspection." The plumbers Brooklyn buyers end up calling six months later, after the cellar drain backs up or the water bill triples, tend to hear the same opening line: but the inspection was clean. It usually was. Inspections cover what's visible, and almost nothing that matters in a house built before the Depression is visible.
An Inspection Checks Fixtures, Not Systems
Home inspectors are generalists working through a checklist. They don't open walls, don't dig, and don't send cameras underground, which means the report describes the last five feet of a plumbing system and stays quiet about the other hundred. A renovated brownstone in Bed-Stuy can have a rain shower, a wall-hung toilet, and brushed brass everything, all of it draining into a clay pipe nobody has looked at since La Guardia was mayor.
Flipped houses are the worst offenders here. New tile hides old pipe better than anything else sold at a hardware store.
Put a Camera Down the Sewer Before You Sign
The sewer lateral runs from the house out to the city main, and in New York the property owner owns every foot of it. A sewer camera inspection costs a few hundred dollars during the contingency window. Skipping it is how buyers inherit five-figure excavation projects, sidewalk torn up, DEP permits on the clock, right after emptying their savings on the down payment.
What the camera finds in this borough is predictable. Root intrusion at the clay joints on tree-lined blocks in Windsor Terrace and Prospect Lefferts Gardens. Bellied sections holding gray water. And in the postwar parts of Mill Basin and Bergen Beach, Orangeburg pipe, a wartime product made of wood pulp and pitch that slowly ovalizes under soil pressure and then collapses without much warning. Sellers rarely disclose any of this. Most of them genuinely don't know.
Ask Where the House Trap Is
Nearly every older Brooklyn house has a house trap, a U-shaped cast iron fitting buried near the front foundation wall with two cleanout plugs at the surface. That little louvered cap on the facade that generations of owners keep painting over is its fresh air inlet. House traps catch debris by design, and a clogged one backs up every fixture in the building at once, usually at the lowest drain, usually on a holiday.
Some traps were removed during past sewer repairs. If the seller has paperwork from that work, ask for it. If the cleanout plugs have rusted into one solid mass, budget accordingly.
Find Out What the Service Line Is Made Of
Houses built before 1961 in this city may still take their water through a lead service line. The city keeps a public lookup showing what's on record for each address, and "unknown" comes up often enough that checking before the offer beats checking after. Replacement is disruptive, not cheap, and it lands on the owner.
A ten dollar pressure gauge threaded onto a hose bib tells you more in thirty seconds than the listing sheet does. Static pressure under 40 psi in a Fort Greene rowhouse usually means the horizontal galvanized runs upstairs have narrowed to almost nothing, and repiping quotes belong in the negotiation, not in next year's surprise column.
While you're down in the cellar, try the main shutoff. A century-old wheel valve that spins freely without actually stopping anything has corroded open, and discovering that during a burst pipe in a Greenpoint kitchen is the expensive version of the lesson. Licensed plumbers can swap it for a quarter-turn ball valve in about an hour once the curb valve is closed.
Mystery Bathrooms and Missing Permits
That full bathroom in the basement of a Kensington or Sunset Park listing deserves ten minutes on the Department of Buildings website. Fixtures sitting below the level of the house trap need an ejector pump to lift waste up to the main line. Unpermitted basement baths tend to skip that part, along with proper venting, correct drain pitch, and everything else that slows a weekend project down.
The tells show up under the sink. Accordion-style flexible drain pipe, an S-trap where a P-trap belongs, a saddle valve feeding the ice maker. Small things, and each one is the signature of work done without a permit or a license, which raises the fair question of what the wall behind it is hiding.
Ten Minutes at the Water Meter
Shut every fixture off and watch the meter. The small triangle on the dial (some meters use a star) is a low-flow indicator, and if it turns while the house sits silent, water is leaving somewhere. A worn flapper in one toilet can move hundreds of gallons a day without a sound, which explains plenty of shocking DEP bills in two-family houses where nobody can figure out what changed. Professional leak detection traces what the meter only hints at, and it costs far less before closing than after the first quarterly bill arrives.
The Hour That Changes the Negotiation
None of this means walking away from a house. It means knowing what the number should actually be. Buyers who bring plumbing pros in during the contingency period, camera footage and pressure readings in hand, renegotiate from a very different position than buyers holding a checklist report that says "functional." Sellers argue with opinions all day long. Footage of a collapsed lateral is harder to argue with.
Brooklyn Plumber Co runs sewer camera inspections, pre-purchase plumbing assessments, drain cleaning, and full repiping jobs across the borough, from Greenpoint down to Brighton Beach. The shop sits at 2361 Nostrand Ave, Brooklyn, NY 11210, and the number for scheduling, including the closing-week rush that comes around every single month, is (929) 605-5967.
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