Skip to main content

Plumbing & Gas

Supply, waste and gas lines. First-fix pipework precedes tiling; fittings and testing finish the wet areas.

Plumbing & Gas covers everything that carries water in, waste out, and gas to the kitchen. The first fix — supply and waste pipework — must be in and tested before tiling seals the wet areas. The second fix installs the taps, sanitaryware and gas appliances.

What it covers​

  • Cold and hot water supply lines.
  • Soil and waste pipework.
  • Gas piping where applicable.
  • Second-fix sanitary fittings, taps and pressure testing.

Where it sits in the sequence​

First-fix runs early with the other M&E trades, before flooring & tiling in wet areas. Second-fix overlaps light & sanitary fittings near the end.

What a PM watches for​

  • Pressure-test before you tile. A leak found after the tiles are down means breaking finished work. Witness the test and capture it.
  • Falls to waste. Floor wastes and gullies must fall correctly or you'll get ponding in showers and kitchens.
  • Gas certification. Gas work must be done by a licensed gas service worker and certified before commissioning.

Generic Singapore fit-out guidance — confirm project specifics with a senior PM.