I Just bought the DET5 Model expansion tank and was going to install it but following all the steps I figured out my water pressure is at a 100psi and the tank is only set to a 20psi precharge so I'm confused because every where I look online for help it says that house water pressure shopuldnt go above 80psi

Trying to replace my expansion tank but not sure how much pressure to pump into it it's a DET5 model and is precharged to 20psi but my water pressure is a 100psi in the house. Is it safe to put that much air in the expansion tank. Everything online says water pressure shouldn't reach over 80psi

Ok, the precharge in the tank is the amount of pressure stored in the air bladder, as water fills the tank it will increase the pressure in the air bladder until it equals the pressure set by your well pump. I agree with the other sources you found that your water pressure shouldn't be set over 80 psi, this is because most plumbing fittings and fixtures are designed to operate below 80 psi. you can lower your pressure by ajusting your well pumps pressure switch, instructions for doing so should be on the cover to your pressure switch.
Hope this helps.

At 100 PSI you're putting a strain on your system. The average house PSI is 45 PSI with 80 PSI tops. Your bladder tank should be charged at 2 PSI under the cut in point of your control box. With the pump shut down and the pressure bled off by opening a cold water faucet.
In other words, if your cut in point is 40 PSI your bladder tank should be charged at 38 PSI. My advice would be to scale your house pressure back to .at least. 80 PSI. Good luck, Tom

I haven't seen many pumps that will pump house pressure to 100 PSI, so I'm betting that Bozzz has city water and will need to have a PRESSURE REDUCING VALVE (see image) installed to reduce the pressure to below 80 PSI... ;)

Back to you, Bozzz


Mark

How about it bozz! Pump or city water?> Back to you, Tom