HARRINGTON INC: 1-800-553-0078 INTERNATIONAL: 814-838-3957

LDH Hydrant Valves (Hydrassist)

Excellent for boosting pressure on long hose lays or for boosting low hydrant pressures. The light-weight hydrant valve enables the first-in pumper to lay LDH directly from the hydrant to the fire and when hose lay is completed, start flowing water from the hydrant. If additional pressure is required, another pumper can connect to the Hydrassist valve and start pumping to raise pressure and flow without interrupting the established water supply. The valve provides an emergency shut-down capability. Choose from a variety of sizes of Storz or NST connections.

The friction loss on the Hydrassist is as follows:
1,000 GPM = 3.36 PSI
1,200 GPM = 4.86 PSI

Dimensions: H: 13” L: 12.75” W: 17”
Weight: 35 lbs

View an instructional video HERE

Download an Instruction Manual with Friction Loss

SKU: H700 Categories: ,


Part Number Hydrant Connection Outlet/Boost
H700-40-40NH 4” NHLH Fem. Swivel 4” Storz $2,554.00
H700-40-45NH 4½” NHLH Fem. Swivel 4” Storz $2,530.00
H700-40-40ST 4” Storz Swivel 4” Storz $2,692.00
H700-50-40NH 4” NHLH Fem. Swivel 5” Storz $2,376.00
H700-50-45NH 4½” NHLH Fem. Swivel 5” Storz $2,374.00
H700-50-50ST 5” Storz Swivel 5” Storz $2,434.00

Contact Us

Harrington, Inc.
2630 West 21st Street
Erie, PA 16506

Phone: 800-553-0078
International: 814-838-3957
Fax: 814.838.7339
Email: info@harrinc.com

Visit our Hydrant Storz/ Sprinkler Storz site at

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About Harrington

A worldwide supplier of high precision water delivery equipment for the fire and fracking industry.

Harrington provides V-Groove couplings, LDH Appliances, Storz adapters, fracking hose couplings and AWG Fittings for water delivery systems.

As a privately owned family business, our main goal is to provide our customers with products that meet and exceed their specifications and to provide superior service.

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about Harold "Hal" Harrington