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I had a problem just this past summer hooking up a pressure washer to a hose outlet. After two hours of constant on-off cycling, had the pipe leading to the hos
by ComputerGuru 3y ago
I had a problem just this past summer hooking up a pressure washer to a hose outlet. After two hours of constant on-off cycling, had the pipe leading to the hose bib burst. You could hear the water hammer quite clearly (and violently!) after I repaired it, so I went back and added a hammer arrestor.
- p3rls 3y agoTo me what I hear: your pipes weren't supported and your pressure is too high if it can be described as violent. I can hear my old office's script telling me to sell you a PRV or two.
- ComputerGuru 3y agoI hear what you’re saying but isn’t it a bit of six of one and half a dozen of the other? The high(er) pressure relative to what the pipes could withstand exacerbates the effects of water hammer induced by the pressure washer’s solenoid constantly slamming open and shut in the matter of milliseconds, no? Lower pressure (via a PRV or otherwise), higher-rated pipes, slowly opening and closing valves, or strategically installed hammer arresters are all (theoretically and to various extents) viable solutions, no?
- p3rls 3y agoBecause you are fixing symptoms (w/ another failure point) with local solutions and not the disease (high pressure, bad or unsupported pipes) and good plumbers do not do that because A) ethics B) liability If your question is can those gas piston water hammer arrestors protect fixtures-- sure, I mean that part is just physics. Whether it's worth it before a hosecock is a completely different matter -- also as per the OP you're far more likely to break a toilet valve just from handling than from water hammer.