In plumbing, a closet
flange (also known as a toilet flange) is a pipe fitting
(specifically, a type of flange) that both mounts a toilet to the
floor and connects the toilet drain to a drain
1. Locate the drain pipe or hole and follow the
watercloset manufacturer’s instruction as to correct distance and
position of the watercloset.
2. Ideally, the flange should be bolted onto the concrete floor
substrate. If the floor has existing ceramic tiles laid out, trace
the outside perimeter of the plastic flange over the tiles to
pattern a 7.5” diameter circle over the pipe or hole. Remove excess
tiles to make the flange flushed or at level with the tiles. For
new construction install the flange first before installing the
3. Use the guides on the plastic flange to orient the final
position of the watercloset. Drill four (4) holes on the floor
using a 5/16” size drill bit and insert the plastic expansion
4. Apply silicone sealants on the sides and bottom of the flange
while giving special attention to the pipe-flange connection. Bolt
down using the metal screws but do not overly tighten as yet.
5. Position the flat-head bolts in upright position. Loosen the
screws a bit if you find it difficult to insert the flat-head bolts
in the head room provided. Tighten the screws afterwards.
6. Position the wax gasket or p-seal over the watercloset horn.
Alternately, place the wax gasket over the plastic flange ensuring
that the wax is dead center over the hole. Apply silicone sealants
all around the bottom perimeter of the watercloset.
7. Lower the watercloset unto the upright bolts and secure with the
washers and nuts provided. Push down with a rocking motion to
ensure that there is a proper seal and fit with the wax gasket.
8. Test the level of the watercloset, the overall fit and water
tightness. Insert the plastic or metal shims to adjust level. Fill
with sealants the uneven portions at the bottom as a precaution
against possible water seepages.
9. Tighten the nuts one side at a time alternating between both
nuts. Do not tighten one side fully before moving onto the other
side. Adjust to achieve the desired level and fit. Take extreme
care in tightening the nuts to prevent damaging the
10. Apply silicone sealants all around the watercloset perimeter
and tool evenly and cleanly.
11. Finally, position and fix the ceramic caps over the nuts and
again, seal with sealant.