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Appreciate the update and the direct message alerting me about it (having made my toilet decisions, I don't hang out on the forum, so I would have missed this post). I've found that some but not all women (and at least one kid, though that might be user error) are affected by the splash back...

I was under the impression a big reason to get a water softener was to protect the water heater, interesting that you're anecdotally reporting the opposite, and that you're seeing issues specifically with Bradford Whites.

Interesting. Bradford White water heaters locate the anode at the hot water output, so something like this wouldn't work (unless you modified them to remove the anode and were able to install this in an alternate location).

I just realized I misunderstood the original suggestion, I was picturing the brass coupling as male-female, not female-female. All clear.

So the brass threaded coupling would not be tapered but the water hammer arrestor would be?

Hmm, the irrigation pipes are PVC, I'm not sure how viable it would be to incorporate a metal segment for the purposes of having a metal place to attach a hammer arrestor. And I haven't seen any PVC threaded male hammer arrestors, either. The Home Depot website has dozens of hammer arrestors...

I think the answer is 1) supply 2) irrigation 3) pipe that runs around the house and serves a spigot on the other side of the house (and which could someday also serve irrigation on that side of the house). The prior homeowners put in the PVC pipes that serve spigots on two sides of the house...

I had a slightly younger version of the same water heater, and the pilot started going out, first monthly, then weekly, then daily, then multiple times a day. Apparently there's a known issue with the control valve, so the current model has a different control valve. I was able to get a warranty...

Anyone have guidance on choosing a water hammer arrestor to have installed as close upstream of my two irrigation valves as possible (attaching photos)? Home Depot has only a few models in stock, most have to be ordered. Most are about $10, the most expensive around $35. My thought is that a...

Turns out there was some kind of utility issue and the neighborhood experienced super high pressures this morning. Several people reported burst pipes :(

I'm making a distinction between a water hammer arrestor (which is like a tiny expansion tank) and an actual expansion tank (which I was calling a full-size expansion tank). It was my impression that a water hammer arrestor should be located on the irrigation supply line, as close to the...

Yep, it's definitely possible my utility supply is the culprit, though it would suggest a pretty serious failure in their systems. My thought was water hammer arrestor (i.e. mini-expansion tank) on the irrigation supply line, close to the irrigation valves, and likely also expansion tank, but...

Really appreciate all the input. If we assume that my utility-provided water pressure is constant, and knowing that there is no backflow preventer installed so pressure should significant dissipate into the supply lines, isn't it surprising that my water heater is able to raise the pressure...

Hmm, interesting new wrinkle. I was working this morning and noticed the nearby shower suddenly started dripping meaningfully, which it's never done before. All components are only about 1.5 years old, but we do have very hard water. Anyway, I checked the PSI gauge on my outside hose spigot...

Yep, circulation pump reversed, albeit still broken and awaiting warranty replacement because the local plumbing supply house and Grundfos need to get their ducks in order...

There seems to be an overwhelming consensus that water hammer is damaging. I'm not seeing much to suggest this is a controversy or many people think it's not damaging. If we assume it's damaging, then I'm left with the question of whether a water hammer arrestor or expansion tank seems like the...

False alarm. The utility cross-contamination specialist was just here. His guys told him I was seeing sustained super-high pressures and that they thought I had a booster pump (apparently people with huge backyard irrigation setups can experience a loss of pressure and install booster pumps to...

Three pictures attached: 1) Main water in with junction supplying backyard irrigation 2) Backyard irrigation valves, frontal 3) Backyard irrigation valves, top view

Okay, to recap... Utility will force me to install a double check valve (a type of backflow preventer) just downstream of my meter, presumably they will have specifications that need to meet. My irrigation needs some kind of backflow preventer located where the irrigation line leaves the main...

Okay, so my irrigation needs some kind of backflow preventer located where the irrigation line leaves the main water line. That could be either a vacuum breaker (if it's higher than my irrigation--how much higher?) or a reduced pressure backflow preventer. That deals with potential backflow...