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Review on 🚰 Certified GUEST Reverse Osmosis Filter: Enhanced Water Purification at Its Best! by Larry Boyd

Revainrating 5 out of 5

Great as a backup backflow preventer for an espresso machine tank.

Ideal. John Guest hardware is the bomb. Anyone say more about this? They are good, sit well, do not flow. Use this as double insurance for a backflow preventer with a float valve in the espresso machine tank. I bought a different brand of faucet and it leaked. Several guest fittings I've used have worked with no issues. I recommend them.

Pros
  • Industry and Science
Cons
  • Uncertain