Since moving in we have some issues with the water pressure in our house. I have adjusted the water pressure coming into the house and measured it at around 60psi (originally was set to around 35-40psi). That helped with the initial low pressure but is still very low when using multiple fixtures.

For instance, I cannot run the hose outside to water the grass and take a shower at the same time without the pressure at both outlets suffering tremendously. Or washing machine and kitchen sink. I get that doing these will cause lower pressure, but it's pretty significant.

Inside the house, the main water line comes up from the basement floor and runs directly to a whole house filter and then through a softener before running to any of the fixtures. Both the filter and softener are Morton brand if that matters. All plastic tubing.

1 Answer 1


Either or both can affect the pressure.

Pressure gauges on both sides would show how much, (if checked while water is flowing through) and in the case of the filter should be there as an indication that it's time to change the filter element. Have you tried that yet? They do require regular replacement (or cleaning, depending on the type of filter element.)

Water softener typically would have less impact, though it's also odd (or frankly poor plumbing layout) to have the hoses on soft water in most cases. Perhaps one specific hose outlet if the water is so hard it leaves spots when you rinse the car, IF you even wash your car at home. Hard water is generally better than softened (with sodium) water for watering plants.

The other element that can commonly affect this is pipe sizes (and/or partially closed valves.) Most water softeners (that I've met) have 1" inlet/outlet, but it's not uncommon for the installer to cheap out and use smaller pipe to connect them, which causes a restriction and pressure drop in use.

It's also possible that the PRV/pressure regulator may be of inadequate size, or have a filter screen of its own that needs to be cleaned. If you have a pressure gauge on it, check to see if it's dropping there (before it even hits the filter and softener) when your water use increases.

  • I've added an image of the setup. the arrow pointing down is water coming into the house/system. Intersting that each unit has its own bypass valve. Main shut off in the foreground.
    – EMAW2008
    Jul 8, 2020 at 16:41
  • 1
    So, you can bypass them both for a test and see if that changes your pressure problem, or not.
    – Ecnerwal
    Jul 8, 2020 at 16:47
  • Will try that. I found the instructions. They call for the untreated water to go out of the house before going into the filter/softer system. so this thing might not be installed correctly to begin with. Ugh.
    – EMAW2008
    Jul 8, 2020 at 16:58

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