Thanks,I misspoke about “cutting pressure “. I just meant I wanted to shut it off. Thanks for all your responses. I really appreciate it…To reduce pressure to the house, but keep higher pressure for irrigation, add a PRV (pressure reducing valve) where the water enters the house. If you modulate the flow with a partially closed valve, the pressure will fluctuate in the house. So if the dishwasher fills, the flow to the shower goes down. Somebody flushes a toilet, and the pressure is reduced for a while in the house. If the clothes washer is doing its thing, the pressure will pulse thru the house.