A plumbing invoice should match the quote, and at Long Island Plumbing Service Co it does: flat rates on toilet rebuilds, faucet and shower valve repairs, disposals, and drain clearing; itemized pricing on repiping, sewer and water service replacement, boiler changeouts, and renovation plumbing; and a plain answer, before anything is sold, on whether a water heater or boiler in a Manhasset, Great Neck, Port Washington, Roslyn, or Old Westbury house is worth fixing. Our licensed and insured plumbers quote in writing first.