WC replacement in Singapore (toilet bowl and pan collar)

What a WC replacement includes

A replacement covers the bowl and the joint it sits on, not just the porcelain. We remove and dispose of the old unit, inspect and renew the pan collar and floor flange, fit the new bowl, seal the base and test the flush and the cistern fill before we leave.

When we lift an old bowl we usually find the collar gasket is perished, the collar is cracked, or the floor screed under the base has softened. Finding that after the bowl is off is normal on older flats, so the collar is treated as part of the job rather than an afterthought.

• - Remove and dispose of the existing WC and its seat
• - New pan collar, flange and gasket where they are perished or cracked
• - Fit and level the new bowl; silicone seal at the base
• - Reconnect the cistern inlet, float valve and flush mechanism
• - Test flush, check for base weep and confirm the soil pipe is drawn properly
• - Clean up and take away the old unit

When the pan collar has to be renewed

The pan collar is the joint between the bowl and the soil pipe. When it fails you get water or a smell at the base of the bowl, and the bowl may rock slightly when you sit on it. Tightening the fixings does not fix a failed collar — the seal itself is gone.

• - Water ring or staining around the base of the bowl
• - A drain smell in the bathroom that does not come from the floor trap
• - The bowl moves when weight is applied
• - Repeated re-siliconing that keeps failing within months
• - Collar visible and cracked once the bowl is lifted

How we check before quoting

The trap type and the rough-in decide whether a bowl fits without changing the floor, so we ask for photos before we commit to a figure. Nothing is ordered until the site detail is clear.

• - S-trap or P-trap, and the trap height from the finished floor
• - Rough-in distance from the finished wall to the soil pipe centre
• - Soil pipe material, size and offset
• - Water supply point position and condition of the stop valve
• - Floor level, and whether the base needs re-screeding
• - Access for a straight lift-out, and whether the door swing clears the new bowl

Types of WC we fit

We supply and install common bowl types, or install a unit you have already bought. The trap and rough-in decide which type suits your bathroom.

The sequence on site

• - Shut the water, drain the cistern and confirm the supply valve holds
• - Disconnect the inlet and lift the old bowl; sheet the floor first
• - Inspect the soil pipe, collar and screed; agree any extra work before continuing
• - Set the new collar and flange, then fit and level the new bowl
• - Test flush and refill, check for weep at the base and re-seal
• - Brief you on what was found, take the old unit away

What is not included unless quoted

• - Hacking, tiling, waterproofing or floor finishes beyond the base of the bowl
• - Concealed cistern carpentry, or framing for a wall-hung unit
• - Relocation of the soil pipe or water supply point
• - Any statutory submission or approval, which is quoted separately where it applies

Condominiums, offices, restaurants and hotels

For multiple units we survey the whole batch, propose a programme that keeps the premises usable, and handle the works outside your service hours where that is needed. We work in occupied premises regularly and sheet and protect the route in and out.

Commercial buyers who need a vendor check before awarding can ask for our company details and licence copies.

Common questions

Where we work

West: Jurong, Clementi, Bukit Batok, Choa Chu Kang · East: Tampines, Pasir Ris, Bedok · North: Woodlands, Yishun, Sembawang · North-East: Punggol, Sengkang, Hougang, Ang Mo Kio · Central: Toa Payoh, Bishan, Queenstown. Full service-area list.

Related

• All plumbing services
• Choked floor trap and drain clearing
• Guide: mini-valve leak under an HDB basin
• Plumber's letter and POWS (after we have seen the job)
• Licences held by AOT Plumbing
• Contact and site survey