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Hydronics
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Hydronic Installation Accessories
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Pressure Relief Valves
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Stocked Items
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Brands
Bell & Gossett (1)
LEGEND (1)
US Boiler Co (3)
WATTS (8)
Webstone (5)
Nominal Size
3/4 in (6)
1 in (1)
Dimensions
2-3/4 in H (1)
2-9/16 in L x 4-9/16 in H (1)
2-3/4 in L x 4-1/2 in H (1)
Domestic/Import
Import (1)
Domestic (5)
Series
740 (1)
335 (2)
374A (1)
4444 (1)
174A (1)
Media
Water (2)
Pressure Rating
150 psi (1)
30 psi (5)
125 psig (1)
Type
Tankless (1)
Material
Brass (1)
Body Material
Bronze (3)
Brass (2)
Iron (2)
Temperature Rating
250 deg F (3)
End Style
FNPT (4)
NPT (1)
MNPT (1)
MNPT x FNPT (1)
Trim Material
EPDM (1)
Pressure Relief Valves
18
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Webstone
1" FIP UnionxPress Tankless Valve Kit
Part #
H-84444WPR-LF
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US Boiler Co
1-1/4in 15# Steam Vlv 1200#/hr 81660505
Part #
81660505
MFG #
81660505
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WATTS
1-1/4inpressr Rlf Vlv 30# 2105000 Btu FS
Part #
740 1-1/4 FS
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WATTS
1in Pressr Rlf Vlv 30# 1300000 Btu
Part #
740 1
Nominal Size
1 in
Domestic/Import
Domestic
Series
740
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WATTS
3/4 FPT Pressure Relief 30# 550000 Btu
Part #
374A
Nominal Size
3/4 in
Domestic/Import
Domestic
Series
374A
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WATTS
3/4 FPT Pressure Relief w/Flood Sensor
Part #
374A FS
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Webstone
3/4 MPT 150 PSI PRV Up To 200mbh In
Part #
20713
Nominal Size
3/4 in
Pressure Rating
150 psi
Body Material
Brass
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WATTS
3/4 MPT Pressure Relief 510000 Btu
Part #
3/4 M335 M1
Nominal Size
3/4 in
Domestic/Import
Domestic
Series
335
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Webstone
3/4" FIP UnionxPress Tankless Valve Kit
Part #
H-84443WPR-LF
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US Boiler Co
3/4in 15# Steam Vlv 407/hr 81660530
Part #
13-511-08
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US Boiler Co
3/4in 15# Steam Vlv 446#/hr 81660500
Part #
13-211-08
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WATTS
3/4in Female Pressure Relief Valve
Part #
3/4 F335 M1
Nominal Size
3/4 in
Dimensions
2-3/4 in H
Domestic/Import
Domestic
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WATTS
3/4in Pressr Rlf 30# 925000 Btu w/fldsen
Part #
740 3/4 FS
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WATTS
3/4inf 30# 650mbh Prv Cash F-30
Part #
174A 3/4 30
Nominal Size
3/4 in
Dimensions
2-3/4 in L x 4-1/2 in H
Domestic/Import
Domestic
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LEGEND
3/4MPT - 1FPT 150 PSI PRV 200K BTU NL
Part #
111-301NL
MFG #
111-301NL
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Bell & Gossett
Relief Valve 110121
Part #
790-30
Nominal Size
3/4 in
Dimensions
2-9/16 in L x 4-9/16 in H
Pressure Rating
125 psig
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Webstone
Tankless Valve Kit 1in IPS ISO
Part #
44444W
MFG #
H-44444W
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Webstone
TanklessIsoVlvKit3/4inW/150#prv<200mbh
Part #
44443WPR
Domestic/Import
Import
Series
4444
Type
Tankless
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Webstone
1" FIP UnionxPress Tankless Valve Kit
Part #
H-84444WPR-LF
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Compare
US Boiler Co
1-1/4in 15# Steam Vlv 1200#/hr 81660505
Part #
81660505
MFG #
81660505
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Compare
WATTS
1-1/4inpressr Rlf Vlv 30# 2105000 Btu FS
Part #
740 1-1/4 FS
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WATTS
1in Pressr Rlf Vlv 30# 1300000 Btu
Part #
740 1
Nominal Size
1 in
Domestic/Import
Domestic
Series
740
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WATTS
3/4 FPT Pressure Relief 30# 550000 Btu
Part #
374A
Nominal Size
3/4 in
Domestic/Import
Domestic
Series
374A
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WATTS
3/4 FPT Pressure Relief w/Flood Sensor
Part #
374A FS
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Webstone
3/4 MPT 150 PSI PRV Up To 200mbh In
Part #
20713
Nominal Size
3/4 in
Pressure Rating
150 psi
Body Material
Brass
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WATTS
3/4 MPT Pressure Relief 510000 Btu
Part #
3/4 M335 M1
Nominal Size
3/4 in
Domestic/Import
Domestic
Series
335
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Compare
Webstone
3/4" FIP UnionxPress Tankless Valve Kit
Part #
H-84443WPR-LF
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Compare
US Boiler Co
3/4in 15# Steam Vlv 407/hr 81660530
Part #
13-511-08
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Compare
US Boiler Co
3/4in 15# Steam Vlv 446#/hr 81660500
Part #
13-211-08
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Compare
WATTS
3/4in Female Pressure Relief Valve
Part #
3/4 F335 M1
Nominal Size
3/4 in
Dimensions
2-3/4 in H
Domestic/Import
Domestic
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WATTS
3/4in Pressr Rlf 30# 925000 Btu w/fldsen
Part #
740 3/4 FS
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WATTS
3/4inf 30# 650mbh Prv Cash F-30
Part #
174A 3/4 30
Nominal Size
3/4 in
Dimensions
2-3/4 in L x 4-1/2 in H
Domestic/Import
Domestic
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LEGEND
3/4MPT - 1FPT 150 PSI PRV 200K BTU NL
Part #
111-301NL
MFG #
111-301NL
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Compare
Bell & Gossett
Relief Valve 110121
Part #
790-30
Nominal Size
3/4 in
Dimensions
2-9/16 in L x 4-9/16 in H
Pressure Rating
125 psig
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Compare
Webstone
Tankless Valve Kit 1in IPS ISO
Part #
44444W
MFG #
H-44444W
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Webstone
TanklessIsoVlvKit3/4inW/150#prv<200mbh
Part #
44443WPR
Domestic/Import
Import
Series
4444
Type
Tankless
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