500psi maximum with blue spring - use silver spring for 1000psi applications.

Used on:

• Hydramaster: Spitfire 3.2, Spitfire 4.0, Crossfire 3.7, Crossfire 4.2, Crossfire 4.4, Profire 3.7, Profire 4.7, Bobcat 3.5, Aquacat 3.5/3.9, Hydracat 3.5, Hydracat 4.0, Hydracat 4.5, CDS 4.2, CDS 4.5, CDS 4.6, CDS 4.7 & CDS 4.8
• Bridgepoint: Dagger

Also consider parts below:

• Repair Parts: O-ring kit: PHY097-028 Spring & o-ring kit: PHY078-101
• Rebuild kit: PHY078-102 1000psi spring: PHY155-021