Chapin 6-8501 21 PSI Constant Flow (CF) Valve, 3/8-Inch BSP thread, Red - chapinmfg

Chapin 6-8501 21 PSI Constant Flow (CF) Valve, 3/8-Inch BSP thread, Red


  • $15.76
    Unit price per 
Shipping calculated at checkout.

PrintWarning: Cancer and Reproductive Harm.

Print Advertencia: Cáncer y Daños Reproductivos.

PrintAvertissement: Cancer et Dommages Reproductifs.


  • 21 PSI Constant Flow Valve
  • 3/8-Inch BSP Thread, Red
  • Includes 11/16-Inch adapters
  • Compatible with 62000, 61900
  • Contact us if your sprayer isn't listed


  • Fungicides
  • Herbicides
  • Pesticides

Technical Specs

Model Number 6-8501

Customer Reviews
5 Based on 2 Reviews
Write a Review

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
Ted P.
United States United States
Does exactly what it's designed to do.

Constant flow valve insured proper spray mixture was being applied due to its ability to maintain between 14 to 21 PSI pressure at a constant volume. This will enable you to do a actual calculation on how much water would you put out with a backpack sprayer per acre. So that you may have just your chemical mixtures in your sprayer as to not to use too much or too little.

Daniel P.
United States United States
plastic pressure valve

Not so good. If you made the valve with a removable top, I could have cleaned it and continued using. The clips holding the top broke when trying to remove the top. A screw on top or even a top cap held with screws would work.