Browse Categories
Browse by Manufacturer

Unloader GP K7 Series

<< Previous in Unloaders Next in Unloaders >>
Price: $127.99
Manufacturer: General Pump
Manufacturer Part No: 1220

Product Options

Available GPM Variations:

GP K-7 Series Flow-Through Unloader
General Pump Flow-through Unloader: K-7 Series (3500 PSI) This unloading valve is a flow-through design and should be mounted on the discharge line of the pump in any position (vertical or horizontal) which allows easy access to the adjusting bolt. A pressure gauge should be installed on either side of the port of the unloader to accurately read pressure during adjustment. Minimum 5% bypass is required for proper operation. Features all stainless and brass internal parts. No external moving parts or springs. Unique balance principle: eliminates high pressure in all lines while unit is in bypass mode. Eliminates pressure peaks normally generated by conventionally designed unloaders. Dual gauge ports.  Available in 4 different gpm variations.
Max Volume
Max DP 
Max Temp. 
Part Number
2.1 to 2.9 GPM
3500 PSI
165 Degree-F
2.9 to 4.2 GPM 
3500 PSI
165 Degree-F
4.2 to 6.6 GPM
3500 PSI
165 Degree-F
6.6 to 10.8 GPM
3500 PSI
165 Degree-F
K-7 Series Unloader
• Features all stainless and brass internal parts.
• New design reduces sensitivity to entrapped air.
• No external moving parts or springs.
• Eliminates high pressure in all lines while unit is in bypass mode.
• Bypass restrictor eliminates pressure peaks during bypass.
• Unique balanced piston design permits precise pressure adjustments.
• Simple design for easy maintenance and service.
Port Sizes: 
Inlet:          3/8-19 BSPP-F
Bypass:     3/8-19 BSPP-F
Outlet:       3/8-19 BSPP-M
7.5 x 3.75 x 3.5 in.
4.5 lbs
Note:  General Pump recommends using a safety relief device in conjunction with this unloader valve when installed on a positive displacement pump. General Pump is not liable and assumes no responsibility for this valve when used in a customer’s high pressure system.

Related Products

Pull Rope 4.5 mm
Price: $11.00
Pull Rope 4.5 mm
Replacement Pull Rope Assembly: 4.5mm rope x 4 ft. length and handle. For units up to 9 h.p.
Gas Cap Honda
Price: $9.75
Gas Cap Honda
Honda Metal Gas Cap: Fits GX120-GX390 Honda Engines.
Fuel Filter Small
Price: $13.50
Fuel Filter Small
Honda Fuel Filter. Small fuel filter, 1/4" or 5/16" barb in and out.
Pump Oil GP
Price: $7.50
Pump Oil GP
General Pump Oil. Premium multipurpose lubricant formulated to protect against rust and oxidation. Offers long service life and prevents sludge and varnish formation, even at high temperatures. Available in pints, and cases of 6 pints.

Product Reviews

Rate This Product:
or Create a Review
(0 Ratings, 0 Reviews)
Shopping Cart
Your cart is empty.
Search Shopping Lists
Create and save your own shopping list or wish list.
To use this feature you must sign in as a registered user.