New Design Features:
• Interior Design – more efficient flow and operation
• Dual Locking Nuts – vibration resistant for setting maximum pressures
• New Spring Material – more resistant to fatigue, powder paint resists rusting
• Piston – large diameter, more strength and contact area for shifting alignment
• Discharge Nipple – sealing o-ring has been moved to the lower part of the thread, increases hydro strength and fitting strength
• Shutter Valve – hex design, less contact area for smooth shifting (prevents binding). larger size, longer life and more positive shifting

Featuring:
• Over sized handle – easier adjustment
• Forged valve body – excellent strength
• Two inlet ports
• Two by-pass ports
• Ultra thick inlet and discharge ports - added strength
• Color coded springs and caps – easy valve identification
• All ports are FNPT

Specifications:
• Spring Color: Blue
• Replaces AL606 & AL606X
• Maximum Pressure: 3,650 PSI
• Max. Volume: 8.0 GPM
• Adjustable pressure
• Brass valve body
• Max. Fluid Temp.: 194° F.
• Inlet Ports (2): 3/8" FNPT
• Discharge Ports (1): 3/8” FNPT
• Bypass Ports (2): 3/8” FNPT
• Weight: 29.6 oz

New Design Features:
• Interior Design – more efficient flow and operation
• Dual Locking Nuts – vibration resistant for setting maximum pressures
• New Spring Material – more resistant to fatigue, powder paint resists rusting
• Piston – large diameter, more strength and contact area for shifting alignment
• Discharge Nipple – sealing o-ring has been moved to the lower part of the thread, increases hydro strength and fitting strength
• Shutter Valve – hex design, less contact area for smooth shifting (prevents binding). larger size, longer life and more positive shifting

Featuring:
• Integral switch detects full bypass mode
• Use for burner control or time delay switch
• Over sized handle – easier adjustment
• Forged valve body – excellent strength
• Two by-pass ports
• Ultra thick inlet and discharge ports - added strength
• Color coded springs and caps – easy valve identification
• All ports are FNPT

Specifications:
• Spring Color: Blue
• Replaces AL686
• Maximum Pressure: 3,650 PSI
• Max. Volume: 8.0 GPM
• Micro Switch 6 AMP, 250 V
• Adjustable pressure
• Brass valve body
• Max. Fluid Temp.: 194° F.
• Inlet Port (1): 3/8" FNPT
• Discharge Ports (1): 3/8” FNPT
• Bypass Ports (2): 3/8” FNPT
• Weight: 33.3 oz

• Comet Check Valve Kit LW, ZW, FW2, HW, RW & SW
• Not for ZWD-K MODELS 3538G, 4042G, 4042S