NNI Inc. Online     |     home
Fire Hydrant Flow Testing
2-1/2" NH - NST Fire Hydrant Swivel Pitot Flowtest Diffuser

This light weigjht Fire Hydrant Swivel Diffuser & Flow Tester has a dual read PSI/GPM Liquid Filled Gauge and a replaceable Pitot tube assembly that has a Brass Pitot Inner Tube, 3 way Brass Ball Valve, and Filter Snubber connected to a Rubber covered Dual Read Gauge and a ball-bearing Polished Brass swivel hydrant adapter. It is a handy wat to perform flow tests on hydrants and diffuse stream at the same time. Available in Yellow color for 60 and 100Psi and Red color in 160 Psi. Also available in 2-1/2" British Instantaneous Female BIC coupling.

H-SD250-***: 2-1/2" Female NST Flowtest Swivel Diffuser with 4" Dial Dual-read Liquid Filled Rubber Boot cover Gauge $449.95
H-SD250Q-***: 2-1/2" Female NST Flowtest Swivel Diffuser with Quick Connect 4" Dial Dual-read Liquid Filled Rubber Boot cover Gauge $469.95
H-SD250C-***: 2-1/2" Female NST Flowtest Swivel Diffuser with 4" Dial Dual-read Liquid Filled Rubber Boot cover Gauge with case $539.95

H-SD250QC-***: 2-1/2" Female NST Flowtest Swivel Diffuser with Quick Connect 4" Dial Dual-read Liquid Filled Rubber Boot cover Gauge with case $569.95
H-SD250I-***: 2-1/2" Instantaneous Female BIC Flowtest Diffuser with 4" Dial Dual-read Liquid Filled Rubber Boot cover Gauge $579.99
***060 for 60 Psi/1300GPM, -***100 for 100Psi/1680GPM, -***160 for 160Psi/2120GPM


NST Swivel Diffuser with Gate Valve _____________Instantaneous Swivel Diffuser

HGV250 NH-AL: 2-1/2" Aluminum Hydrant Gate Valve with Speed Handle -Red Painted with Hard Anodized Swivel- $159.50
HGV250 NH: 2-1/2" Brass Hydrant Swivel Gate Valve with Red Speed Handle - $178.95.
HGV250 NH-PB: 2-1/2" Brass Hydrant Swivel Gate Valve Red Body Polished Brass Trim with Red Speed Handle - $249.95.
H-RR025: -1/4" x 25ft Quick Connect Remote read assembly with Bleeder valve $69.95
SG-Test: -NIST Certification and Testing of Gauge ordered with Diffuser $39.95
H-SD250: -2½" NST Flushing only Swivel Diffuser with Plug (No Gauge) $328.95
H-SD250C:  Hydrant Swivel Diffuser Carrying Case only $95.50
H-PT025A: Piezo/Pitot Tube Assembly with snubber, bleeder Valve & Pitot Tube $57.95
H-PT0375I: spare Inner Pitot Tube $27.95


H-SD250K1: 2-1/2" NST Swivel Diffuser Flow Test Kit with your choice 4" Dial Quick Connect Dual read Psi/GPM Gauge, Remote Read assembly in a weatherproof carrying case: $620.95

H-SD250K2: 2-1/2" NST Swivel Diffuser Flow Test Kit with your choice 4" Dial Quick Connect Dual read Psi/GPM Gauge, Hydrant Gate Valve in a weatherproof carrying case: $720.95

Click to see more Kits: Hydrant Flow Test Kits



Hydrant Swivel Diffuser & Flow Tester in action


Quick Connect remote read assembly

H-SD250K1 Hydrant Swivel Diffuser with Remote in a case

H-SD250K2 Hydrant Swivel Diffuser with Gate Valve in a case
NNI 2-1/2" NH - NST Hydrant Swivel Thrust Buster Street T Pitot Flowtest Diffuser

This 2-1/2" NST heavy duty Fabricated (Yellow) Swivel T Diffuser is used to Flowtest and reduce the force of flowing water from fire hydrants or hose lines to control erosion and direct the flow pattern safely. It is recommended for all field-testing or water main flushing operations in which unsecured hoses are used to direct water flow. Available options are Straight version with Single and Dual Handles and 30° upbend.

It also has a replaceable pressure Pitot tube assembly with a quick connect Dual read Liquid Filed Psi/GPM Gauge assembly and a ball-bearing swivel hydrant adapter used to perform flow tests on hydrants and diffuse stream. Please note that there will be some pressure loss due to backpressure at the T bend.
Data Sheet Thrust Buster T Diffuser with Flow Chart

H-SD250TS-060: Thrust Buster Street T Swivel Hydrant Piezo Diffuser Straight 2½" NST Single Handle with 4" Dial 60Psi/1300GPM Dual-read Gauge $659.99
H-SD250TS-100: Thrust Buster Street T Swivel Hydrant Piezo Diffuser Straight 2½" NST Single Handle with 4" Dial 100Psi/1680GPM Dual-read Gauge $659.99
H-SD250TS-160: Thrust Buster Street T Swivel Hydrant Piezo Diffuser Straight 2½" NST Single Handle with 4" Dial 160Psi/2120GPM Dual-read Gauge $659.99


H-SD250TS2-060: Thrust Buster Street T Swivel Hydrant Piezo Diffuser Straight 2½" NST Dual Handle with 4" Dial 60Psi/1300GPM Dual-read Gauge $699.99
H-SD250TS2-100: Thrust Buster Street T Swivel Hydrant Piezo Diffuser Straight 2½" NST Dual Handle with 4" Dial 100Psi/1680GPM Dual-read Gauge $699.99
H-SD250TS2-160: Thrust Buster Street T Swivel Hydrant Piezo Diffuser Straight 2½" NST Dual Handle with 4" Dial 160Psi/2120GPM Dual-read Gauge $699.99


H-SD250TB-060: Thrust Buster Street T Swivel Hydrant Piezo Diffuser 30° up-bend 2½" NST with 4" Dial 60Psi/1300GPM Dual-read Gauge $735.99
H-SD250TB-100: Thrust Buster Street T Swivel Hydrant Piezo Diffuser 30° up-bend 2½" NST with 4" Dial 100Psi/1680GPM Dual-read Gauge $735.99
H-SD250TB-160: Thrust Buster Swivel Street T Hydrant Piezo Diffuser 30° up-bend 2½" NST with 4" Dial 160Psi/2120GPM Dual-read Gauge $735.99


2-1/2" NST Straight T Single Handle Swivel Hydrant Flow test Diffuser in Case

H-SD250TS: - 2-1/2" NST Swivel Thrust Buster Street T Diffuser Straight with Plug Single Handle (Flushing only-No pitot Gauge assembly) $439.95
H-SD250TS2: - 2-1/2" NST Swivel Thrust Buster Street T Diffuser Straight with Plug Dual Handle (Flushing only-No pitot Gauge assembly) $469.50
H-SD250TB: - 2-1/2" NST Swivel Thrust Buster Street T Diffuser 30°up-bend with Plug (Flushing only-No Pitot Gauge assembly) $489.50


2-1/2" NST x 50ft 800Psi Test Yellow Fire Hose

H-RR025: -1/4" x 25 ft Quick Connect Remote read assembly with Bleeder $69.95
H-SD250C: -Thrust Buster Diffuer Case (only for Singe Handle Straight version) $95.50
SG-Test -NIST Certification and Testing of Gauge ordered with Diffuser $39.95
HS-HOSE2.5X10 - 2-1/2" NST x 10' Double Jacket Hose 800Psi Test- Yellow $95.95
HS-HOSE2.5X15 - 2-1/2" NST x 15' Double Jacket Hose 800Psi Test- Yellow $135.95
HS-HOSE2.5X50 - 2-1/2" NST x 50' Double Jacket Hose 800Psi Test- Yellow $239.95


H-SD250TS-100 2-1/2" NST Straight T Swivel Hydrant Flow test Diffuser

2-1/2" NST Straight T Single Handle Swivel Hydrant Flow test Diffuser

2-1/2" NST Straight T Dual Handle Swivel Hydrant Flow test Diffuser

2-1/2" NST 30^ T Swivel Hydrant Flowtest Diffuser

H-SD250TS2 2-12" T Swivel Hydrant Diffuser- Flushing only
NNI 4", 4-1/2" NST & 5" Storz Hydrant Swivel Pitot Pumper Flowtest Diffuser

This 4" or 4.5" NST heavy duty Fabricated (epoxy coated Yellow) Swivel Diffuser is used to Flowtest as well as reduce the force of flowing water from fire hydrants or hose lines to control erosion and direct the flow pattern safely. It can be connected with a Fire Hydrant with a 4" or 4.5" NST. Also with a 4" or 5" Storz connections. The unit weighs 30Lbs. A wheeled carrying case is optional.

It includes a replaceable pressure Pitot tube Quick connect assembly with a quick connect 4" Dial Rubber covered Pressure Gauge assembly with Pressure Snubber and a ball-bearing swivel hydrant adapter used to perform flow tests on hydrants and diffuse stream.

H-SD400-060: 4" NST Swivel Hydrant Pitot Flowtet Diffuser with 4" Dial 0-60Psi/2958GPM Dual Read Liquid Filled Gauge $679.50
H-SD400-100: 4" NST Swivel Hydrant Pitot Flowtet Diffuser with 4" Dial 0-100Psi Liquid Filled Gauge $679.50
H-SD400-160: 4" NST Swivel Hydrant Pitot Flowtet Diffuser with 4" Dial 0-160Psi Liquid Filled Gauge $679.50

H-SD450-060: 4-1/2" NST Swivel Hydrant Pitot Flowtet Diffuser with 0-60Psi/2958GPM Dual Read Liquid Filled Gauge $719.99
H-SD450-100: 4-1/2" NST Swivel Hydrant Pitot Flowtet Diffuser with 4" Dial 0-100Psi Liquid Filled Gauge $719.99
H-SD450-160: 4-1/2" NST Swivel Hydrant Pitot Flowtet Diffuser with 4" Dial 0-160Psi Liquid Filled Gauge $729.99

H-SD400S-060: 4" Storz Swivel Hydrant Pitot Flowtet Diffuser with 4" Dial 0-60Psi/2958GPM Dual Read Liquid Filled Gauge $725.99
H-SD400S-100: 4" Storz Swivel Hydrant Pitot Flowtet Diffuser with 4" Dial 0-100Psi Liquid Filled Gauge $725.99
H-SD400S-160: 4" Storz Swivel Hydrant Pitot Flowtet Diffuser with 4" Dial 0-160Psi Liquid Filled Gauge $735.99


H-SD500S-060: 5" Storz Swivel Hydrant Pitot Flowtet Diffuser with 4" Dial 0-60Psi/2958GPM Dual Read Liquid Filled Gauge $755.99
H-SD500S-100: 5" Storz Swivel Hydrant Pitot Flowtet Diffuser with 4" Dial 0-100Psi Liquid Filled Gauge $755.99
H-SD500S-160: 5" Storz Swivel Hydrant Pitot Flowtet Diffuser with 4" Dial 0-160Psi Liquid Filled Gauge $765.99

H-RR025: -1/4" x 25 ft Quick Connect Remote read assembly with Bleeder $69.95
SG-Test: -NIST Certification and Testing of Gauge ordered with Diffuser $39.95

H-SD400C: 4" & 4-1/2" Hydrant Swivel Diffuser Carrying Case with wheels $239.49


H-PT040A: Piezo/Pitot Tube Assembly with snubber, bleeder Valve & Pitot Tube $66.95
H-PT0400I: Inner Pitot Tube for 4" Pipe $34.95
VAL-B3WAY025-4MFF: - 1/4" NPT NNI 3 way Bleeder Ball Valve $20.95
H-PT0250S: 1/4" MNPT x 1/4" FNPT NNI Pressure Gauge Filter Snubber $11.50
HS-HOSE4X10: 4" NST x 10' Hose Yellow, 500 Psi Test Aluminum Rocker Lug Couplings $299.95
HS-HOSE4.5X10: 4-1/2" NST Hose 5" x 10' Hose Yellow, 400 Psi Test Aluminum Rocker Lug Couplings $349.95


H-SD400: - 4" NST Swivel Diffuser with Plug (Flushing only-No Gauge) $499.50
H-SD450: - 4.5" NST Swivel Diffuser with Plug (Flushing only-No Gauge) $529.50


4" NST Hydrant Diffuser at Ronald Reagon Airport Washington DC


4" NST Swivel Hydrant Flowtest Diffuser





4" NST Swivel Diffuser H-SD400-100
NNI 4", 4-1/2" NST & 5" Storz Hydrant Swivel Thrust Buster Street T Pitot Flowtest Diffuser

This 4" or 4.5" NST / 4" or 5" Storz x 6" outlet heavy duty Fabricated (Yellow) Swivel T Diffuser is used to Flowtest as well as reduce the force of flowing water from fire hydrants or hose lines to control erosion and direct the flow pattern safely. It is recommended for all field-testing or water main flushing operations in which unsecured hoses are used to direct water flow. It can be connected with a Fire Hydrant with a 4", 4.5" NST or 4" 5" Storz connectionss

It includes a replaceable pressure Pitot tube assembly with a quick connect 4" Dial Gauge assembly with Pressure Snubber and a ball-bearing swivel hydrant adapter used to perform flow tests on hydrants and diffuse stream. Please note that there will be some pressure loss due to backpressure at the T bend.
Data Sheet Thrust Buster T Diffuser with Flow Chart

H-SD400T-060: 4" NST Thrust Buster Street T Swivel Hydrant Pitot Flowtet Diffuser with 4" Dial 0-60Psi/2958GPM Dual Read Liquid Filled Gauge $1099.99
H-SD400T-100: same as above but with 100Psi Liquid Filled Gauge $1099.99
H-SD400T-160: same as above but with 160Psi Liquid Filled Gauge $1099.99

H-SD450T-060: 4-1/2" NST Thrust Buster Street T Swivel Hydrant Pitot Flowtet Diffuser with 4" Dial 0-60Psi/2958GPM Dual Read Liquid Filled Gauge $1165.99
H-SD450T-100: same as above but 100Psi Liquid Filled Gauge $1165.99
H-SD450T-160: same as above but 160Psi Liquid Filled Gauge $1165.99


H-SD400TS-060: 4" Storz Thrust Buster Street T Swivel Hydrant Pitot Flowtet Diffuser with 4" Dial 0-60Psi/2958GPM Dual Read Liquid Filled Gauge $1299.99
H-SD400TS-100: same as above but with 100Psi Liquid Filled Gauge $1299.99
H-SD400TS-160: same as above but with 160Psi Liquid Filled Gauge $1299.99

H-SD500TS-060: 5" Storz Thrust Buster Street T Swivel Hydrant Pitot Flowtet Diffuser with 4" Dial 0-60Psi/2958GPM Dual Read Liquid Filled Gauge $1355.99
H-SD500TS-100: same as above but with 100Psi Liquid Filled Gauge $1355.99
H-SD500TS-160: same as above but with 160Psi Liquid Filled Gauge $1355.99


H-RR025: -1/4" x 25 ft Quick Connect Remote read assembly with Bleeder $69.95
SG-Test: -NIST Certification and Testing of Gauge ordered with Diffuser $39.95
HS-HOSE4X10: - 4" NST x 10' Hose Yellow, 500 Psi Test Aluminum Rocker Lug Couplings $299.95
HS-HOSE4.5X10: 4-1/2" NST Hose 5" x 10' Hose Yellow, 400 Psi Test Aluminum Rocker Lug Couplings $349.95

4", 4.5" NST & 5" Storz Flushing T Diffuser

Flushing T Diffusers

H-SD400T: - 4" NST x 6" Thrust Buster Flushing Swivel Street T Diffuser
(Flushing only-No Gauge) $970.50

H-SD450T: - 4.5" NST x 6" Thrust Buster Flushing Swivel Street T Diffuser
(Flushing only-No Gauge) $995.50

H-SD500TS: - 5" Storz x 6" Thrust Buster Flushing Swivel Street T Diffuser
(Flushing only-No Gauge) $1080.00


4-1/2" NST Swivel Hydrant Flowtest T Diffuser

5" Storz Swivel Hydrant Flowtest T Diffuser


H-RR025 1/4" x 25ft Remote Read assembly
Click here for Parts and Accessories

E-mail: nni_inc@hotmail.com
Phone: 305-687-3330
Toll Free: 1-877-NNI-FIRE
Fax: 815-366-8272
Copyright © 2001 NNI INC. All rights reserved.