Serving Chennai · Ponneri · Gummidipoondi · Tiruvallur · Avadi & the AP–TN border belt +91 90039 03003 WhatsApp Mon–Sat, 9:30 AM – 6:30 PM
Plumbing & sanitary · arranged through partner suppliers

Sanitaryware: S-Trap or P-Trap WC, Basins and What to Measure First

Decide the WC outlet before the floor is cast: an S-trap pan drains down through the floor, a P-trap out through the wall behind. S-trap suits floors with the drain below; P-trap suits wall-hung WCs and drains run in the wall. Measure from the finished wall, and buy vitreous china to IS 2556 with a dual-flush cistern.

WhatsApp
Stack of plastic pipes
Plumbing & sanitary

How we supply it: Sanitaryware is arranged through a partner sanitary dealer who quotes, supplies and bills it and pays us a referral commission. We ask you to fix the WC models before the floor is cast, so the plumber sets the drains to match.

Also calledsanitaryware, western closet, EWC, commode, wash basin
StandardIS 2556 vitreous sanitary appliances

In one line: Sanitaryware is the set of glazed ceramic fixtures in a bathroom, the WC, washbasin, urinal and their cisterns, usually made of vitreous china to IS 2556.

S-trap or P-trap WC?

The two WC outlet types compared
PointS-trapP-trap
Outlet directionDown through the floorBack through the wall
Drain positionBelow the floor slab or sunken portionIn or behind the wall
Common withFloor-mounted WCsWall-hung WCs, some upper floors
What to measureWall to outlet centreOutlet height from floor
Neither is better in itself; your drain position decides. Pick the WC model before the floor slab or sunken portion is cast, so the plumber sets the drain exactly for it.

Next question: Which fixture types are there? More

What vitreous china means

Sanitaryware is the set of glazed ceramic fixtures in a bathroom, the WC, washbasin, urinal and their cisterns, usually made of vitreous china to IS 2556.

Vitreous china is fired until the body is dense and barely absorbs water, then glazed. The glaze quality decides how easily the bowl stays clean.

Next question: Floor-mounted or wall-hung? More

Fixture types

Common sanitaryware for Indian homes
FixtureNotesPlan for
Floor-mounted WC with cisternMost common; S- or P-trapDrain position before casting
Wall-hung WC with concealed cisternEasy floor cleaningA support frame inside the wall
One-piece WCPan and cistern as one unitHeavier; check the outlet distance
Indian (squatting) WCSet into the floorSunken slab depth
Washbasin: wall-hung, pedestal or counter-topCounter-top suits a vanityWaste and supply points at the right height

Next question: What should I measure before buying? More

Measure before you buy

Flush valves need more pressure than a gravity tank on the roof usually gives; cisterns work at low pressure.

  • S-trap: distance from the finished wall (after tiles) to the centre of the floor outlet
  • P-trap: height of the wall outlet above the finished floor
  • Space in front of the WC and beside it for comfortable use
  • Washbasin rim height, commonly about 800–850 mm
  • Dual-flush cisterns commonly use 3 and 6 litres per flush

Next question: How do I check the pieces? More

Checks on sanitaryware

  1. Tap each piece with a coin: it should ring clear; a dull sound can mean a hidden crack.
  2. Look at the glaze under light for pinholes, crazing and wavy patches, especially inside the bowl.
  3. Check the trap type and outlet size on the box against your drain.
  4. After fixing, flush with a few sheets of tissue to test clearance.
  5. Check the seat hinges are not plated mild steel that will rust.

Next question: How should pieces be kept until fixing? More

Storing and protecting

  • Keep pieces boxed and upright until fixing; ceramic chips easily.
  • Fix after tiling and cover with the carton until handover.
  • Remove cement stains with mild cleaners, never acid.

Next question: Which taps and mixers go with it? More

Sanitaryware mistakes

  • Choosing the WC after the floor and drain are cast.
  • A wall-hung WC without its support frame planned in the wall.
  • No fall from the WC outlet to the soil stack.
  • A flush valve on a low-pressure gravity supply.
  • Basins fixed at the wrong height for the family.

Next question: Which drainage pipes behind the WC? More

Questions buyers ask

Sanitaryware: questions buyers ask

Is an S-trap better than a P-trap?

Neither is better in itself; the drain position decides. S-trap suits a drain below the floor, P-trap a drain in the wall behind the WC, as with wall-hung WCs. Decide before the floor slab or sunken portion is cast.

Why is an S-trap illegal?

S-trap WCs are not banned in India; floor-outlet WCs are common here. The concern in some foreign plumbing codes is S-shaped traps under sinks siphoning dry without venting. Proper venting of the soil stack prevents that.

Do toilets need p-traps?

Every WC needs a trap holding a water seal against sewer gas, and it is built into the pan. S and P describe which way the outlet leaves the pan: down through the floor or back through the wall.

Which trap commode is best?

The one whose outlet matches your drain: S-trap for a floor drain, P-trap for a wall drain. After that, choose on flushing performance, glaze quality and a dual-flush cistern.

What should I measure before buying a WC?

For S-trap, the distance from the finished wall to the centre of the floor outlet; for P-trap, the outlet height above the finished floor; and the free space in front of the pan. Compare these with the model's drawing before buying.

Need Sanitaryware with your order?

Call, WhatsApp or send the quote form with it filled in: a partner supplier quotes, supplies and bills it, and we time it with your loads.

WhatsApp