Are there ball-check valves available for pex? [closed]

Question

After some searching the web I am failing to find any available ball-check valves (described on: https://www.archtoolbox.com/materials-systems/plumbing/plumbingvalvetypes.html) that I can use with my pex plumbing. Currently I have a swing check valve but it makes a loud bang each time my washing machine cycles so a plumber I once talked to told me you could get a vertical check valve that has a ball sitting in a seat they close very quietly. I know I could also get a spring-loaded valve, but liked the idea of the ball-check. Does such a thing exist? Are there any examples you can link me to?

Apparently this is considered off-topic? For those voting it as such, where else can I ask if such things exist? Please provide an alternative. If you want me to word my question differently, here goes: I have a thermal expansion tank because the city has a check valve at the road for my house and after a shower, pressure would build up in my pipes in excess of 90psi after expansion. So I installed an expansion tank, solved that problem. New problem is that after a shower and the expansion tank absorbs the pressure, if I turn on a cold valve in the house the expansion tank first pushes out some hot water before city water enters the pipes and you would get a short blast of hot water. I solved this by using a swing check valve separating my hot and cold lines in the house so that the expansion tank can never push hot water back to the cold. Problem is that the swing valve is noisy, especially when the inlet valve on the washing machine closes and sends a pressure wave back through the cold side that pushes up the swing valve and quickly closes it, causing a bang (not from water hammer mind you, but from the brass flap closing). I would like to try a different valve that would be quieter and I would like to avoid a spring valve because that would induce a slight amount of back pressure to my hot water lines and I think a ball-check valve could be a quiet, effective solution. Does anyone have experience that agrees with this or a better alternative? I'm not opposed to examples of products.

Answer 1

I haven't seen any direct-crimp check valves, but I have seen some "sharkbite" style spring check valves. They take up very little room and are easy to install.

These will work on PEX or other types of pipes and can be removable if you think it has become inoperable. I personally prefer anything with moving parts to be threaded or otherwise removable to make replacement or repair easier, but that's not an absolute rule.

Answer 2

The valve is to separate my hot/cold lines in the house so that when the hot water expansion tank builds up pressure it won't be able to push hot water out through the cold side.

I don't understand the part about "pushing hot water out through the cold side".

However, thermal expansion can be a problem that causes higher pressure and leaks at faucets and that is why they make expansion tanks for the hot water side of your water heater. One should be added to the hot water supply line next to the water heater.

The loud banging you are hearing may be water hammer from the washer turning off the supply lines. Both lines should have anti-hammer devices near the ends of the lines.

Swing gate valves are designed to be installed horizontal since they do not contain a spring. They will not work properly in a vertical leg. The hot and cold water lines do not need to be connected with a check valve.