Browse Forums General Discussion 1 Jun 10, 2020 5:09 pm had a plumber come around today to fix water hammer problems in the house we added a valve at the meter, changed a washer/valve on the open tap for washing machine and also another valve at water heater and seems to solve half the taps but i still have issues present since i spent enough on the above without a complete solution i asked what i can do in the interim plumber suggested going through roof and under house to re-clip all pipes or do any missing. he wasnt confident that would solve the problem my dad also suggests putting rubber or clips with rubber has anyone got any suggestions on what could be my next steps or anything i should look at? i kind of dont want the plumber to come back around and spend endless time assessing things when i could have done it myself Re: Pipe banging/water hamme 2Jun 10, 2020 5:31 pm You mentioned adding a valve at the meter. Is it an older established house and if so, have you recently purchased it? Hammer isn't something that happens overnight. Did the plumber open all taps and then open the mains valve and flush for a few minutes? 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: Pipe banging/water hamme 3Jun 10, 2020 5:35 pm SaveH2O You mentioned adding a valve at the meter. Is it an older established house and if so, have you recently purchased it? Hammer isn't something that happens overnight. Did the plumber open all taps and then open the mains valve and flush for a few minutes? sorry, house is 25 years old and been here for 2 years been an issue for a while now. ive just been noticing it more with kids being home and im working from home havent been able to financially fix this issue as i had other problems more of a concern to attend to no, he didnt open all taps and then open the mains valve. i suggested at the time if he should do that and he said the valve at front should fix that should i call him back? Re: Pipe banging/water hamme 4Jun 10, 2020 5:54 pm i called the plumber back and suggested that i should open all the taps and mains said it doesnt sound like air is the major cause now but more that pipes might need to be clipped as half the house doesnt have the problem, it could be a loose piped connected to the 1/2 taps that causes the problem ill clip everything and take photos of all the t's when im under the house not sure what else i can do to help solve the issue Re: Pipe banging/water hamme 5Jun 10, 2020 8:14 pm Yep, eliminating air as a cause is the first step in the process of elimination. There is a difference between a loose pipe banging and water hammer. Hammer at an end fixture is like a thump. Is it a banging or a thump? They have distinct sounds and I am sure that the plumber would have identified this. Hammer occurs when a fixture is suddenly turned off. Have you tried turning the taps off slowly and is the banging only when they are turned off? Somehow you need to identify the sound's source. Being an older house, it most probably didn't have a pressure reducer fitted at the mains but it has now. Just wondering what pressure the new reducer is. The maximum pressure allowed now is 500 kPa and most pressure reducers fitted are about 20% below this. This sounds like a big difference but it isn't because it takes x4 the head to double the flow rate. Some pressure reducers fitted are only 350 kPa. 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: Pipe banging/water hamme 6Jun 10, 2020 8:43 pm SaveH2O Yep, eliminating air as a cause is the first step in the process of elimination. There is a difference between a loose pipe banging and water hammer. Hammer at an end fixture is like a thump. Is it a banging or a thump? They have distinct sounds and I am sure that the plumber would have identified this. Hammer occurs when a fixture is suddenly turned off. Have you tried turning the taps off slowly and is the banging only when they are turned off? Somehow you need to identify the sound's source. Being an older house, it most probably didn't have a pressure reducer fitted at the mains but it has now. Just wondering what pressure the new reducer is. The maximum pressure allowed now is 500 kPa and most pressure reducers fitted are about 20% below this. This sounds like a big difference but it isn't because it takes x4 the head to double the flow rate. Some pressure reducers fitted are only 350 kPa. when i open the mixer fast and close it fast they bang both ways. if i do the taps slow then i don't get the sound at all. the washing machine is running at the moment and it did normally make a hammer when it shut of its water valve. after today, i didnt even know it was running not sure on the pressure. ill have to take a look in the morning and see. for me it sounds like a hollow sound. so it would be a bang if i am correct. like something is knocking rattling on something. so ill have to go buy some clips and then clip everything. he mentioned that overclipping is not an issue, so while im under the house i might as well to it as good as i can the first time i also thought while i end up going to reece i might as well get some new washers for all taps, unless someone has another idea. i thought if i can eliminate or do those 2 jobs without the plumber then im saving myself a bit of $$ any thoughts on the best washers? i hear dome washers help with water hammer. Re: Pipe banging/water hamme 7Jun 10, 2020 8:59 pm Just one step at a time. Do the clipping first and see how you go. Washing machine solenoids are fast closing and the hammer is distinct. Fitting a very small pressure tank is a good way to fix hammer. 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: Pipe banging/water hamme 8Jun 11, 2020 10:55 am SaveH2O Just wondering what pressure the new reducer is. The maximum pressure allowed now is 500 kPa and most pressure reducers fitted are about 20% below this. This sounds like a big difference but it isn't because it takes x4 the head to double the flow rate. Some pressure reducers fitted are only 350 kPa. pressure is set at 500kpa Re: Pipe banging/water hamme 9Jun 12, 2020 1:06 am We installed new mixer taps in our older house a year ago. the new mixers have a compensating component to balance the water temperature if someone turns on a tap. Works a treat but the hammer was awful. I went around with the plumber and added clips everywhere. We also added a pressure reducer and 4 x anti-hammer gas arrestors. We still have some pipe hammer, it occurred to me on,y last weekend that the copper pipe transitions from copper to poly just after the bathroom feed. The poly pipe runs under a small slab to a garden tap. I now believe this is the cause as it appears the pipe was installed after the slab was laid. They appeared to have tunnelled under the slab and have left a lot of air around it. This was always the case but the new tap seems to encourage hammering. Re: Pipe banging/water hamme 10Jun 12, 2020 9:25 am forrestmount We installed new mixer taps in our older house a year ago. the new mixers have a compensating component to balance the water temperature if someone turns on a tap. Works a treat but the hammer was awful. I went around with the plumber and added clips everywhere. We also added a pressure reducer and 4 x anti-hammer gas arrestors. We still have some pipe hammer, it occurred to me on,y last weekend that the copper pipe transitions from copper to poly just after the bathroom feed. The poly pipe runs under a small slab to a garden tap. I now believe this is the cause as it appears the pipe was installed after the slab was laid. They appeared to have tunnelled under the slab and have left a lot of air around it. This was always the case but the new tap seems to encourage hammering. thanks where did you install the gas arrestors? under the mixer taps? im assuming that will be my next step if after clipping i still have hammer any photos you can show? DIY, Home Maintenance & Repair We have a hot water copper pipe that runs from our hot water unit on one side of our house under a concrete slab to our bathroom and laundry...old house so not ideal. The… 0 2733 OK it's been a little while! I've been busy getting time where I can to work on this. I started by grading a pad (borrowing a… 26 17371 yep sounds good make the footing bigger to to allow for the pipe in the middle 3 5284 |