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

PRINT an Instruction Manual with Friction Loss

SKU: H700 Categories: ,


Part Number Hydrant Connection Outlet/Boost
H700-40-40NH 4” NHLH Fem. Swivel 4” Storz $2,909.00
H700-40-45NH 4½” NHLH Fem. Swivel 4” Storz $2,897.00
H700-40-40ST 4” Storz Swivel 4” Storz $3,048.00
H700-50-40NH 4” NHLH Fem. Swivel 5” Storz $2,764.00
H700-50-45NH 4½” NHLH Fem. Swivel 5” Storz $2,786.00
H700-50-50ST 5” Storz Swivel 5” Storz $2,815.00
HPM-HV Post Mount for H700 Hydrant Valve $310.00

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

Recent Tweets


From Southland Fire and Safety Equipment
...read more
"Thank you!"
...read more
"Oustanding Service"
...read more
"A good day hence forth is spelled: H A R R I N G T O N"
...read more

About Harrington, Inc.

As a privately owned family business established in 1988, our main goal is to provide our customers with products that meet and exceed their specifications delivered on time with superior customer service. We are proud that the majority of our products are Made in USA supporting American workers. Our Made in America products are machined from raw aluminum that is again Made in USA. This along with products from Canada and Germany provides the highest quality products available.

...Read More
about Harold "Hal" Harrington