Fix W.C. pan at the required level, considering 15 mm (1”/2) sunk from the floor level.
Block the P-trap outlet hole with gunny bags and fill the W.C. pan with sand to prevent any damage by the water-proofing workmen.
Check the W.C. pan for its centre.
Fill the extra gap around W.C. pan over the topping coat, with brick bat and mortar in layer upto a minimum of 7.5 cm (3”) below the top of I.W.C.
Allow curing for a minimum of three days.
The final topping coat should be done upto 50 mm (2”), below top of I.W.C. with a slight slope towards the W.C. pan.
Roughen the top coat surface with a wire brush to receive tile mortar with the required bonding.
Continuous curing should be done for a minimum of seven days with wet gunny bags.
All the joints of P-trap, flush pipe, connection to vertical line etc. should be properly joined.
