Hi hope you can help... I have recently had a new torbeck valve fitted in my toilet and ever since this the toilet bangs when the valve shuts of on the toilet.. I have had a water hammer arrester fitted, also the valve has been checked on the stop cock.. that is OK... so I had the pressure reducing comb (for high pressure) taken out of my torbeck now I get a bang when it flushes and one when it shuts off, also all my pipes have been checked and are all secure... I noticed when I had my old torbeck removed it had two washers behind the blue retaning nut,. also why can you buy two types of torbecks one with a metal pin which holds the black shut off washer in place the other one has a black shut off washer with a small plastic pin in it which locates in a hole in the flush stork... would it help by putting the low pressure comb in instead of the one for high pressure, because the toilet without one in sounds like a jet wash when filling up,. please I need help before I put a sledge hammer through my toilet.:(

What is your water pressure, should be about 40-45 psi.

My water pressure is high but I have lived in my property for 8 years and always had a torbeck filling system... this problem has only happened since I replaced the old torbeck

The torbeck makes the same bang sound when you first pull the flush handle then when it stops filling it makes the sound again... Thanks for any help

My water pressure is high but i have lived in my property for 8 years and always had a torbeck filling system....this problem has only happened since i replaced the old torbeck

How high, exactly, is your water pressure? Another solution would be to add a air chamber, (see image) just ahead of the angle stop. Good luck, Tom

Please tell us you psi. Even if it doesn't cure your immediate issue a pressure reducing valve can be easily, inexpensively installed to provide protection from many other possible plumbing problems. A buddy of mine had a pvc toilet supply line bust at his weekend retreat. By the time he got to the cabin 350,000 gallons of water had flowed through the house for a week causing over $300,000 damage. Insurance paid for evrything except his $3000 water bill.