44 Results
Filters 5
Popularity Product Name Mfg. Part Number Order Number

Relief Valves, Expansion Tanks, Valves & Controls, System Components, Hydronics & Plumbing

3/4" Pressure Safety Relief Valve R55-746
3/4" Pressure Safety Relief Valve
Model #: M335M2-030 3/4; Inlet Conn.: 3/4" Male; Outlet Conn.: 3/4" Female; Conn. Size: 3/4" Male; Body Type: Bronze; Pressure Setting: 30; BtuH: 510,000;
Brand: Watts Mfg #: 0342692
Catalog Pg.: 506 View Similar Items
Hot Water Expansion Tank L86-191
Hot Water Expansion Tank
Type: Extrol - Hydronic; Tank Size: 4.4 Gal.; Max. Volume: 2.5 Gal.; Diameter: 11"; Height: 15-1/2";
Brand: Amtrol Mfg #: 30
Catalog Pg.: 504 View Similar Items
3/4" Pressure Safety Relief Valve R55-747
3/4" Pressure Safety Relief Valve
Model #: 335M2-030 3/4; Inlet Conn.: 3/4" Female; Outlet Conn.: 3/4" Female; Conn. Size: 3/4" Female; Body Type: Bronze; Pressure Setting: 30; BtuH: 510,000;
Brand: Watts Mfg #: 0342691
Catalog Pg.: 506 View Similar Items
3/4" Iron Boiler Pressure Relief Valve Forged Bronze inlet 30 PSI For Protection of Hot Water Heating Boilers R54-684
3/4" Iron Boiler Pressure Relief Valve Forged Bronze inlet 30 PSI For Protection of Hot Water Heating Boilers
Model #: 374A-BRZ-030 CAN; Inlet Conn.: 3/4"; Outlet Conn.: 3/4"; Conn. Size: 3/4"; Body Type: Iron — Bronze Inlet; Pressure Setting: 30; BtuH: 550,000;
Brand: Watts Mfg #: 358553
Catalog Pg.: 507 View Similar Items
Water Heater Expansion Tank for Potable Water L86-193
Water Heater Expansion Tank for Potable Water
Type: Therm-X-Trol - Potable; Tank Size: 2.0 Gal.; Max. Volume: 1.0 Gal.; Diameter: 8"; Height: 12-5/8";
Brand: Amtrol Mfg #: ST-5
Catalog Pg.: 504 View Similar Items
Hot Water Expansion Tank L86-192
Hot Water Expansion Tank
Type: Extrol - Hydronic; Tank Size: 7.6 Gal.; Max. Volume: 2.5 Gal.; Diameter: 11"; Height: 23";
Brand: Amtrol Mfg #: 60
Catalog Pg.: 504 View Similar Items
Hot Water Expansion Tank L86-190
Hot Water Expansion Tank
Type: Extrol - Hydronic; Tank Size: 2.0 Gal.; Max. Volume: 1.0 Gal.; Diameter: 8"; Height: 12-5/8";
Brand: Amtrol Mfg #: 15
Catalog Pg.: 504 View Similar Items
3/4" Bronze Boiler Pressure Relief Valve 30 PSI For Protection of Hot Water Heating Boilers R54-685
3/4" Bronze Boiler Pressure Relief Valve 30 PSI For Protection of Hot Water Heating Boilers
Model #: 174A-030 3/4; Inlet Conn.: 3/4"; Outlet Conn.: 3/4"; Conn. Size: 3/4"; Body Type: Bronze; Pressure Setting: 30*; BtuH: 650,000;
Brand: Watts Mfg #: 274428
Catalog Pg.: 507 View Similar Items
Water Heater Expansion Tank for Potable Water L86-194
Water Heater Expansion Tank for Potable Water
Type: Therm-X-Trol - Potable; Tank Size: 4.4 Gal.; Max. Volume: 3.2 Gal.; Diameter: 11"; Height: 15";
Brand: Amtrol Mfg #: ST-12
Catalog Pg.: 504 View Similar Items
Hot Water Expansion Tank L86-479
Hot Water Expansion Tank
Type: Fill-Trol - Hydronic; Tank Size: 4.4 Gal.; Max. Volume: 2.5 Gal.; Diameter: 11"; Height: 17-3/8";
Brand: Amtrol Mfg #: 110
Catalog Pg.: 504 View Similar Items
Hot Water Expansion Tank L86-478
Hot Water Expansion Tank
Type: Fill-Trol - Hydronic; Tank Size: 2.0 Gal.; Max. Volume: 1.0 Gal.; Diameter: 8"; Height: 14-3/4";
Brand: Amtrol Mfg #: 109
Catalog Pg.: 504 View Similar Items
Relief Valve L37-316
Relief Valve
Conn. Size: 3/4"; Body Type: Bronze; PSI Setting Relief: 30; Wt. Lbs.: 1.25;
Brand: Bell & Gossett Mfg #: 110121
Catalog Pg.: 507 View Similar Items
Relief Valve Lead Free L47-538
Relief Valve Lead Free
Conn. Size: 1/2"; Body Type: Bronze; PSI Setting Reducing: 12; PSI Setting Relief: 30;
Brand: Bell & Gossett Mfg #: 110197LF
Catalog Pg.: 509 View Similar Items
Relief Valve Lead Free L47-539
Relief Valve Lead Free
Conn. Size: 1/2"; Body Type: Iron; PSI Setting Reducing: 12; PSI Setting Relief: 30;
Brand: Bell & Gossett Mfg #: 110199LF
Catalog Pg.: 509 View Similar Items
Water Pressure Safety Relief Valve For Protection of Hot Water Heating Boilers R55-840
Water Pressure Safety Relief Valve For Protection of Hot Water Heating Boilers
Model #: 174A-150 3/4; Inlet Conn.: 3/4"; Outlet Conn.: 3/4"; Conn. Size: 3/4"; Body Type: Bronze; Pressure Setting: 150; BtuH: 2,445,000;
Brand: Watts Mfg #: 274836
Catalog Pg.: 507 View Similar Items
3/4" x 3/4" Bronze Steam Safety Relief Valve R56-813
3/4" x 3/4" Bronze Steam Safety Relief Valve
Model #: 315M2-015; Inlet Conn.: 3/4"; Outlet Conn.: 3/4"; Conn. Size: 3/4"; Body Type: Bronze; Pressure Setting: 15;
Brand: Watts Mfg #: 0342629
Catalog Pg.: 507 View Similar Items
3/4" Poppet Type Pressure Relief Valve with Test Lever N45-027
3/4" Poppet Type Pressure Relief Valve with Test Lever
Model #: 3L-150 3/4; Inlet Conn.: 3/4"; Outlet Conn.: 3/4"; Conn. Size: 3/4 MIPT x 3/4" FIPT; Body Type: Bronze; Pressure Setting: 150; BtuH: 200,000;
Brand: Watts Mfg #: 0011917
Catalog Pg.: 576 View Similar Items
Water Heater Expansion Tank for Potable Water L82-372
Water Heater Expansion Tank for Potable Water
Type: Therm-X-Trol - for Tankless; Conn. Size: ½" NPTM; Diameter: 3"; Height: 4";
Brand: Amtrol Mfg #: ST-1
Catalog Pg.: 504 View Similar Items
3/4" Lead Free Vacuum Relief Valve R56-226
3/4" Lead Free Vacuum Relief Valve
Model #: LFN36M1 3/4 CAN; Inlet Conn.: 3/4"; Outlet Conn.: 1/2"; Conn. Size: 3/4"; Body Type: Bronze; Pressure Setting: 15;
Brand: Watts Mfg #: 556031
Catalog Pg.: 577 View Similar Items
3/4" Iron Boiler Pressure Relief Valve 30 PSI For Protection of Hot Water Heating Boilers R54-687
3/4" Iron Boiler Pressure Relief Valve 30 PSI For Protection of Hot Water Heating Boilers
Model #: 740-030 3/4; Inlet Conn.: 3/4"; Outlet Conn.: 1"; Conn. Size: 3/4"; Body Type: Iron — Bronze Outlet; Pressure Setting: 30*; BtuH: 925,000;
Brand: Watts Mfg #: 382008
Catalog Pg.: 507 View Similar Items
Hot Water Expansion Tank L81-221
Hot Water Expansion Tank
Model #: PLT-5; Type: Potable; Conn. Size: 3/4"; Tank Size: 2.1 Gal.; Max. Volume: 1; Diameter: 8"; Height: 11";
Brand: Watts Mfg #: 0067370
Catalog Pg.: 577 View Similar Items
1" Bronze Boiler Pressure Relief Valve 30 PSI For Protection of Hot Water Heating Boilers R54-686
1" Bronze Boiler Pressure Relief Valve 30 PSI For Protection of Hot Water Heating Boilers
Model #: 174A-030 1; Inlet Conn.: 1"; Outlet Conn.: 1"; Conn. Size: 1"; Body Type: Bronze; Pressure Setting: 30*; BtuH: 1,005,000;
Brand: Watts Mfg #: 274934
Catalog Pg.: 507 View Similar Items
3/4" Boiler Pressure Relief Valve For Protection of Hot Water Heating Boilers R55-839
3/4" Boiler Pressure Relief Valve For Protection of Hot Water Heating Boilers
Model #: 174A-100 3/4; Inlet Conn.: 3/4"; Outlet Conn.: 3/4"; Conn. Size: 3/4"; Body Type: Bronze; Pressure Setting: 100; BtuH: 1,695,000;
Brand: Watts Mfg #: 274683
Catalog Pg.: 507 View Similar Items
1" Iron Boiler Pressure Relief Valve 30 PSI For Protection of Hot Water Heating Boilers R54-688
1" Iron Boiler Pressure Relief Valve 30 PSI For Protection of Hot Water Heating Boilers
Model #: 740-030 1; Inlet Conn.: 1"; Outlet Conn.: 1-1/4"; Conn. Size: 1"; Body Type: Iron — Bronze Outlet; Pressure Setting: 30*; BtuH: 1,300,000;
Brand: Watts Mfg #: 382570
Catalog Pg.: 507 View Similar Items
FTL Finance
Powered by Site Search powered by SLI Systems

© 2025 Johnstone Supply. All rights reserved.

Select products to compare.
Compare