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I used to have really good luck with 1" Rain Bird zone valves $15-20 , ran on 24v, the float needed to be a switch. every couple of years we put in a $5 diaphram. The only slightly bad thing was with alot of main pressure they came on quick, also quick on shut off, you need a cover or it splashed a little.
I've been using the Watermaster 1" valves for some time. The one in the cold water tank on our Vector is original, six years old and never been touched. The hot water ones need a new diaphragm maybe once a year, and now that the valve body has a stainless steel seat they can be rebuilt indefinitely. I keep a rebuilt spare and a spare valve head, spring and float and an extra diaphragm.
I've used the Watermaster and Jobe valves, had good results with both. The Jobe's are all plastic and easier to change when they eventually go bad., but they seem to work well for a long time.
My Watermaster works fine on city pressure side, but not at all on gravity pressure on my reject tank. For that I use a Robert Bob 1" float valve - kind of pricey but built like a tank and works well under low pressure with much better flow than my Watermaster.