If it's a trapped tundish and it terminates into a soil pipe, flushing the toilet could be pulling air in through the tundish as the water goes past.
Also, what Shaun said.
You are an absolute star! It was Brett-Martin and using the measurements I took was able to find one at a local merchant. I had to buy the whole assembly and just use the internals but that has saved a nightmare of a job. The parts...
I appreciate your efforts. That's a good place to start. I'm trying to avoid driving around to all the merchants and looking at everything. I'll find out who does Brett stuff and start there. Might as well start somewhere. Amazing the...
Hi Guys,
I have a customer who has had building work done and the pot (if that's what it's called) has gone missing. I believe the builders blocked the drain with debris, removed the insert/pot/grill and the clowns didn't put it...