Kenrich Products

The Leader in Heavy Duty
Hand Grout Pumps since 1986!

GP-6 Grout Pump

Hand Operated, Twin Diaphragm, 4.6 Gal. Hopper

Our model GP-6 is a twin diaphragm hand-operated grout pump. This pump features two separate diaphragms mounted side-by-side and are connected together by common inlet and outlet cast aluminum manifolds. A single pump handle operates both pumps. The advantage of two diaphragms is a much smoother output flow as well as effectively doubling the output volume. Output capacity is up to twelve gallons per minute and is a popular choice for filling hollow concrete block.

The supplied standard grout placement hose is 1 ½" ID by 5’ long clear vinyl tubing with a polished interior and rigid straight steel tube in the end. Optional 1 ½" hoses available in 10’, 15’ and 20’ lengths. Popular options include our ¾" and 1" hose reducer kits which attach directly to the outlet of the pump and are used in place of the standard 1 ½" hose. Click here for more information on our line of GP-6 grout pump Upgrades, Accessories and Repair Kits.

Kenrich GP-6 Grout Pump Features and Benefits.

  • Cementitious Grout Pump- Pumps non shrink sand based cementitious grouts. 
  • Hand Operated- No electric or air power source, no problem.
  • Low Pressure- 15 psi max. - Ideal anywhere high pressure is not required.
  • Heavy Duty- Built for durability and long lasting performance
  • Lightweight and Portable- Take the pump to where you need the grout.
  • Easy to Operate- Minimal maintenance required.
  • Built with pride in the USA.
  • In Stock / Ready to Ship UPS. We have Kenrich grout pumps, accessories and parts in stock and are ready to ship UPS ground, 2 day or overnight. 

Kenrich Pump Specs/ Model GP-6:

Pump Type Twin Diaphragm, Self-Priming
Power Source Hand Operated
*Output Capacity 11 gallons/minute
Output Pressure 0 to 15 psi
Hopper Capacity .62 cubic foot (4.6 gallons)
Placement Hose Size 1-1/2" ID by 5’ long, Clear Vinyl Hose
Discharge Head 10 Foot Vertical Lift
Dimensions 16-1/2" x 25" x 24" high
Net Weight 32 pounds
*Output and performance will vary depending on cycle rate, viscosity of the grout mixture and pressure conditions.



 Kenrich grout pump hose reducer kit, from1 1/2" to 1" ID x 5' clear vinyl hoseKenrich Pump's 1 1/2" heavy duty clear vinyl replacement hose in 5' sectionsGalvanized steel pump hose end nozzles   4.6 gallon grout hopperpressure gauge


Hose Reducer Kits:                                 3/4" and 1" ID Available

1-1/2" ID Hose Lengths:                        

5', 10', 15', 20' and 50' long
1-1/2" Hose Ends:                                     Straight, 90 degree and 180 degree Elbows
Hi-Capacity Hopper Kit                                 Converts GP-1 to GP-2 Specifications
Pressure Guage 15 psi, not available aftermarket - see pressure gauge video!


Pumping Aggregate Materials Through Your Kenrich Grout Pump.

The Kenrich line of heavy-duty grout pumps are designed to pump non-shrink sand based cementitious grouts. However if you need to pump Grout with AGGREGATE, we recommend a factor premix Grout in the bags with no bigger than 3/8” pea gravel. Crushed rock/stone 3/8" in size and larger, not recommended do to jagged edges, even though some contractors make it work. Call the office for more info at 503-281-6190.

For more information on our Kenrich Products’ Model GP-6 Heavy Duty grout pump, go to  Upgrades, Accessories and Repair Kits and the GP-6 Owner's Manual.