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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
In Stock
Nominal Size
3/4 in (4)
1 in (1)
Dimensions
2-3/4 in H (1)
2-3/4 in L x 4-1/2 in H (1)
Domestic/Import
Domestic (5)
Series
740 (1)
335 (2)
374A (1)
174A (1)
Media
Water (2)
Pressure Rating
30 psi (5)
Body Material
Bronze (3)
Iron (2)
Temperature Rating
250 deg F (2)
End Style
FNPT (4)
MNPT (1)
Pressure Relief Valves
8
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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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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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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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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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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
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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