Relief Valves

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RHEEM -

Drain Valves

StyleModelOverall LengthBody MaterialPrice
ASP12112L-Brass€11.71
BSP330090-Brass€13.28
CRTG20164AF--€13.51
DAP16830C--€11.91
EAP16830E--€13.81
FAP16830B--€12.66
CRTG20006AW--€25.67
GSP6070G-Brass€39.32
HSP12231B3 3/4"Brass€29.37
ISP12159G5 1/4"Poly€15.16
APOLLO VALVES -

14-600 Series Vacuum Relief Valves

StyleModelSizeHeightMaterialFinishConnection TypePrice
A14606V18HV-----€1,309.77
B14605V16-----€715.02
B14606V10-----€659.42
C14606V302 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,298.21
C14606V14Q2 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,343.66
C14606V252 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,309.77
C14606V182 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,298.21
C14606V202 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,298.21
C14606V172 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,309.77
C14606V162 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,298.21
C14606V152 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,298.21
C14606V132 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,298.21
C14606V122 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,309.77
C14606V082 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,298.21
C14606V12Q2 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,347.78
C14606V262 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,298.21
C14606V112 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,298.21
C14606V142 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,298.21
C14606V092 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,298.21
C14605V12Q2"165.1 mmBronzeNoneMNPT x FNPT€835.80
C14605V142"165.1 mmBronzeNoneMNPT x FNPT€789.51
C14605V152"165.1 mmBronzeNoneMNPT x FNPT€789.51
B14605V202"165.1 mmBronzeNoneMNPT x FNPT€789.51
C14605V14Q2"165.1 mmBronzeNoneMNPT x FNPT€839.09
C14605V092"165.1 mmBronzeNoneMNPT x FNPT€789.51
APOLLO VALVES -

29 Series Safety Valves

StyleModelOutlet SizeSpring MaterialSeat MaterialBody MaterialPrice
A29303A55-Stainless SteelTeflonBronze€533.76
A29402A165-Stainless SteelTeflonBronze€524.66
A29202A36-Stainless SteelTeflonBronze€450.87
A29303L65-Stainless SteelTeflonBronze€533.76
A29402A301 1/4"Stainless SteelTeflonBronze€529.33
B29303L551 1/4"Stainless SteelTeflonBronze€538.54
A29402A1501 1/4"Stainless SteelTeflonBronze€524.66
B29402A1351 1/4"Stainless SteelTeflonBronze€529.33
A29402A1201 1/4"Stainless SteelTeflonBronze€524.66
A29402A1301 1/4"Stainless SteelTeflonBronze€524.66
A29303A100BH1 1/4"Stainless SteelTeflonBronze€538.54
B29402A1001 1/4"Stainless SteelTeflonBronze€524.66
B29402A1101 1/4"Stainless SteelTeflonBronze€524.66
A29402A1051 1/4"Stainless SteelTeflonBronze€524.66
A29402A1041 1/4"Stainless SteelTeflonBronze€524.66
A29402A331 1/4"Stainless SteelTeflonBronze€524.66
A29303L361 1/4"Stainless SteelTeflonBronze€533.76
A29303A951 1/4"Stainless SteelTeflonBronze€533.76
A29303L451 1/4"Stainless SteelTeflonBronze€533.76
A29303L331 1/4"Stainless SteelTeflonBronze€533.76
A29303L200S1 1/4"Stainless SteelTeflonBronze€693.79
A29303L301 1/4"Stainless SteelTeflonBronze€538.54
A29303L2001 1/4"Stainless SteelTeflonBronze€533.76
A29303L1351 1/4"Stainless SteelTeflonBronze€533.76
B29303L1501 1/4"Stainless SteelTeflonBronze€533.76
APOLLO VALVES -

19 Series Safety Valves

StyleModelSeat MaterialDisc MaterialSizeConnection TypeOutlet SizeSpring MaterialMaterialFinishPrice
A19EDDA50--------€500.94
B19KJHK5ER--------€1,306.78
A19EEDL40--------€529.56
A19EEEK150A--------€601.68
A19EEDL50--------€529.56
A19EFEL40BHCE--------€653.45
A19EFEL45CE--------€653.91
A19EFEL45Q--------€678.26
A19EFEL40CE--------€653.45
C19EGGL45--1 1/2"MNPT x FNPT--BronzeNone€844.61
A19EDCL50--------€474.14
C19EGGL45BH--1 1/2"MNPT x FNPT--BronzeNone€821.20
A19EDCL45BHCE--------€497.82
C19EHGA125--1 1/2" x 2"MNPT x FNPT--BronzeNone€899.21
B19KDCK5ER--------€449.26
C19EJHA125--2" x 2 1/2"MNPT x FNPT--BronzeNone€1,397.60
C19KGFK165Q--1 1/4" x 1 1/2"MNPT x FNPT-Stainless SteelBronzeNone€706.54
C19KGFK165AQ-Brass1 1/4" x 1 1/2"MNPT x FNPT-Stainless SteelBronzeNone€773.46
A19EEDA15BH--------€550.58
A19EDCA100--------€474.14
B19KFESAMPLE--------€588.83
RFQ
A19EDCL50Q--------€522.59
A19EDCA100CE--------€497.82
A19EFEA15BH--------€629.75
B19EDCL100--------€474.14
APOLLO VALVES -

17 Series Pressure Only Hot Water Relief Valves

StyleModelFactory Set PressureDischarge CapacityOverall HeightInlet TypeOutlet TypeOutlet SizeTemp. RangeTest LeverPrice
A1740203125 psi791000 btuH3 1/4"MNPTFNPT3/4"0°F to +250°FTest Lever Included€63.47
B1740204150 psi934000 btuH3 1/4"MNPTFNPT3/4"0°F to +250°FTest Lever Included€63.47
StyleModelFactory Set PressureSeat MaterialDisc MaterialPressure RatingOverall HeightInlet TypeOutlet TypeOutlet SizePrice
A165010160 psiBuna NBuna N50 psi to 250 psi4 1/8"MNPTFNPT1/2"€82.77
A165012560 psiPTFEPTFE50 psi to 250 psi4 1/8"MNPTFNPT1/2"€92.56
A1650102250 psiBuna NBuna N250 psi to 600 psi4 1/8"MNPTFNPT1/2"€75.50
A1650160250 psiPTFEPTFE250 psi to 600 psi4 1/8"MNPTFNPT1/2"€85.54
StyleModelMPNPrice
A16202021620202€41.43
A16203051620305€40.75
APOLLO VALVES -

15 Series ASME Air Relief Valves

StyleModelSpring MaterialDisc MaterialBody MaterialSeat MaterialFinishPrice
A15112B200CESteelBrassBrassVitonPlain Brass€115.54
A15112B35SteelBrassBrassVitonPlain Brass€88.41
A15118B150SteelBrassBrassVitonPlain Brass€211.78
A15118B30SteelBrassBrassVitonPlain Brass€211.78
A15112B200QSteelBrassBrassVitonPlain Brass€139.22
A15112B250SteelBrassBrassVitonPlain Brass€86.63
A15112B250QSteelBrassBrassVitonPlain Brass€139.19
A15112B220SteelBrassBrassVitonPlain Brass€88.41
A15112B25SteelBrassBrassVitonPlain Brass€86.63
B15112B235SteelBrassBrassVitonPlain Brass€111.11
A15112B25CESteelBrassBrassVitonPlain Brass€109.78
A15112B25CEQSteelBrassBrassVitonPlain Brass€158.46
A15112B30SteelBrassBrassVitonPlain Brass€86.63
A15112B30CESteelBrassBrassVitonPlain Brass€115.54
A15112B35CESteelBrassBrassVitonPlain Brass€111.21
A15118B250SteelBrassBrassVitonPlain Brass€211.78
B15112B45SteelBrassBrassVitonPlain Brass€86.63
A15112B40SteelBrassBrassVitonPlain Brass€86.63
B15112B60SteelBrassBrassVitonPlain Brass€86.63
A15112B50SteelBrassBrassVitonPlain Brass€54.31
A15112B50CESteelBrassBrassVitonPlain Brass€110.42
A15112B65SteelBrassBrassVitonPlain Brass€88.41
A15112B60CESteelBrassBrassVitonPlain Brass€115.54
A15112B75CESteelBrassBrassVitonPlain Brass€107.67
A15112B70SteelBrassBrassVitonPlain Brass€86.63
APOLLO VALVES -

14-500 Series Low Pressure Air Relief Valves

StyleModelSizeHeightMaterialFinishConnection TypePrice
A1450510X-----€959.75
B1450605-----€588.15
C14506092 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,263.19
C14506072 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,263.19
C14506152 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,263.19
C14506122 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,263.19
C14505132"165.1 mmBronzeNoneMNPT x FNPT€757.90
C14505082"165.1 mmBronzeNoneMNPT x FNPT€757.90
C14505152"165.1 mmBronzeNoneMNPT x FNPT€757.90
C14505212"165.1 mmBronzeNoneMNPT x FNPT€764.68
C14505202"165.1 mmBronzeNoneMNPT x FNPT€757.90
C14505102"165.1 mmBronzeNoneMNPT x FNPT€757.90
C14505162"165.1 mmBronzeNoneMNPT x FNPT€757.90
C14505122"165.1 mmBronzeNoneMNPT x FNPT€757.90
C1450514P72"165.1 mmBronzeNoneMNPT x FNPT€757.90
C14505042"165.1 mmBronzeNoneMNPT x FNPT€757.90
C14505052"165.1 mmBronzeNoneMNPT x FNPT€414.10
C14505072"165.1 mmBronzeNoneMNPT x FNPT€757.90
C14507173"222.25 mmBronzeNoneMNPT x FNPT€1,561.43
C14507143"222.25 mmBronzeNoneMNPT x FNPT€1,561.43
C14507133"222.25 mmBronzeNoneMNPT x FNPT€1,561.43
C14507103"222.25 mmBronzeNoneMNPT x FNPT€834.81
C14507153"222.25 mmBronzeNoneMNPT x FNPT€1,561.43
DIXON -

Relief Valves

StyleModelMax. Temp.GradePressure RatingSizeStyleTypeSeat MaterialMaterialPrice
ASPR-LCE2A200266°FGrade 31650 psi to 100 psi2"L BodyL BodyEPDMStainless Steel-
RFQ
BSPR-TCE3A150266°FGrade 316100 psi to 300 psi1 1/2"T BodyT BodyEPDMStainless Steel€1,213.04
APOLLO VALVES -

14-400 Series Low Pressure Air Relief Valves

StyleModelSizeHeightMaterialFinishConnection TypePrice
A1440610P5-----€1,239.02
A144076P5-----€1,522.18
B1440511-----€635.54
B1440612-----€1,059.25
A144077P5-----€1,522.18
A1440517-----€743.41
A1440711P5-----€1,522.18
A144069P5-----€1,239.02
C14406182 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,228.07
C14406142 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,228.07
C14406172 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,228.07
C14406162 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,228.07
C14406082 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,228.07
C14406192 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,228.07
C14406052 1/2"193.68 mmBronzeNoneMNPT x FNPT€661.24
C14406132 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,239.02
C14406112 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,239.02
C14406102 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,228.07
C14406092 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,228.07
C14406222 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,228.07
C14406152 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,228.07
C1440607Q2 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,289.08
C14406072 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,239.02
C14406062 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,228.07
C14406042 1/2"193.68 mmBronzeNoneMNPT x FNPT€1,239.02
APOLLO VALVES -

14-200 Series Low Pressure Steam Safety Valves

StyleModelOverall HeightOutlet SizeInlet Connection SizeFactory Set PressureInlet TypeOutlet TypeOverall LengthTemp. RangePrice
A14205087 1/8"2"2"15 psiMNPTFNPT-0°F to +250°F€514.57
B14206088 1/4"2 1/2"2 1/2"15 psiMNPTFNPT7 1/2"0°F to +250°F€1,157.47
C14207089 3/8"3"3"15 psiMNPTFNPT-0°F to +250°F€1,427.18
APOLLO VALVES -

14 Series High Volume Safety Relief Valves

StyleModelMPNPrice
A14205A414205A4€737.34
A14205A614205A6€737.34
A14205A714205A7€737.34
A14205A914205A9€737.34
B14205B414205B4€737.34
A14206A714206A7€1,401.72
B14206B414206B4€1,414.22
A14207A414207A4€1,657.17
A14207A514207A5€1,657.17
A14207A714207A7€1,671.95
B14207B114207B1€1,657.17
B14207B414207B4€1,657.17
A14205031420503€737.34
A14205041420504€737.34
B14205051420505€737.34
B14205061420506€716.13
B14205071420507€737.34
A1420508G1420508G€779.37
A1420508Q1420508Q€765.72
B14206031420603€1,401.72
A14206041420604€1,414.22
B14206051420605€1,414.22
A14206061420606€1,380.51
A1420606G1420606G€1,443.81
A14206071420607€1,401.72
APOLLO VALVES -

13-500 Series Low Pressure Steam Safety Valves

StyleModelFinishOutlet SizeSpring MaterialSeat MaterialBody MaterialPrice
A13512B09-----€87.07
A13511B06-----€88.12
A13511S08-----€114.26
B13511A2-----€71.66
B13511B6-----€93.57
A13511B12-----€88.12
B13511B07-----€88.12
A13511B08-----€88.15
B13511A3-----€93.57
A13511B10Bronze Finish3/4"Stainless SteelModified TFEBronze€65.13
A13511B05Bronze Finish3/4"Stainless SteelModified TFEBronze€88.15
A13512B05Bronze Finish3/4"Stainless SteelModified TFEBronze€88.12
A13512B10Bronze Finish3/4"Stainless SteelModified TFEBronze€65.13
A13512B15Bronze Finish3/4"Stainless SteelModified TFEBronze€44.47
A13511B15Bronze Finish3/4"Stainless SteelModified TFEBronze€99.79
B13511P05Polished Chrome Finish3/4"Stainless SteelModified TFEBronze€150.94
B13511P15Polished Chrome Finish3/4"Stainless SteelModified TFEBronze€127.67
B13511P10Polished Chrome Finish3/4"Stainless SteelModified TFEBronze€127.67
B13511S15Satin Chrome Finish3/4"Stainless SteelModified TFEBronze€91.21
StyleModelOverall LengthFactory Set PressureOverall HeightOutlet SizeInlet Connection SizeDischarge CapacityInlet TypeOutlet TypePrice
A13211B152.833"15 psi3 11/16"3/4"3/4"475000 btuHMNPTFNPT€132.55
A13211B052.833"5 psi3 11/16"3/4"3/4"-MNPTFNPT€130.39
A13211B102.833"10 psi-3/4"3/4"-MNPTFNPT€119.40
A13213B153 3/8"15 psi4 1/2"1 1/2"1 1/4"1200000 btuHMNPTFNPT€243.64
A13214B154"15 psi5 1/4"2"1 1/2"1900000 btuHMNPTFNPT€360.70
A13202B155 3/8"15 psi2 1/16"1"1"643000 btuHMNPTFNPT€140.44
A13202B055 3/8"5 psi2 1/16"1"1"-MNPTFNPT€139.82
A13202B105 3/8"10 psi2 1/16"1"1"-MNPTFNPT€125.46
APOLLO VALVES -

13 Series Low Pressure Steam Boiler Valves

StyleModelOutlet SizeFinishSpring MaterialSeat MaterialBody MaterialPrice
A13202A6-----€146.96
A13214B12-----€304.22
A13213B07-----€232.22
A13202B07-----€146.96
A13213B08A-----€232.22
A13213B08-----€232.22
A13213B12A-----€232.22
B13214A2-----€284.76
A13214B06-----€262.40
A13214B07-----€308.03
A13214B09-----€305.31
A13214B08-----€304.22
A13214B08A-----€304.22
A13214B11-----€305.31
A13214B13-----€305.31
A13213B06Q-----€283.86
A13214B12A-----€304.22
A13214B13A-----€304.22
A13214B17-----€305.35
A13214B14-----€282.24
B13214E1-----€306.72
RFQ
B13202A4-----€146.96
B1320202-----€154.22
A13202B06-----€146.96
B13202B08-----€146.85
APOLLO VALVES -

13-100 Series Low Pressure Steam Safety Valves

StyleModelOutlet TypeOverall LengthFactory Set PressureOutlet SizeSeat MaterialBody MaterialOverall HeightInlet TypePrice
A13101B08--------€123.83
A13101B06--------€123.83
A13101B06Q--------€172.01
B13101B07--------€129.81
A13101B11--------€122.73
B13101A4--------€130.86
A13101B12--------€129.61
C13101B15FNPT2.188"15 psi3/4"EPDMCast Bronze2 7/8"MNPT€103.33
C13101B05FNPT2.187"5 psi3/4"EPDMCast Bronze2 7/8"MNPT€111.56
C13101B10FNPT2.187"10 psi3/4"EPDMCast Bronze2 7/8"MNPT€95.84
A13101B05ATop Outlet--Not ApplicableModified TFEBronze--€176.68
A13101B15QTop Outlet--Not ApplicableModified TFEBronze--€148.10
A13101B10ATop Outlet--Not ApplicableModified TFEBronze--€107.63
A13101B10QTop Outlet--Not ApplicableModified TFEBronze--€148.10
MCDONNELL & MILLER -

Relief Valves

StyleModelOverall HeightFactory Set PressureSeat MaterialDisc MaterialBody MaterialConnection TypeInlet Connection SizeOutlet Connection SizePrice
A260-1 1/2-30--------€2,021.72
B250-3/4-304 9/16"30 psiBronzeEPDMBronzeNPT x NPT3/4"1"-
RFQ
APOLLO VALVES -

119 Series Safety Valves

StyleModelConnection TypeSizeSpring MaterialSeat MaterialDisc MaterialFinishMaterialPrice
A119JGCAMAA0051-------€3,622.53
B119JGCAMAA0015-1 1/2" x 2 1/2"Stainless SteelMetalStainless Steel-Cast iron€3,590.49
B119NMDLMAA0150Flange4" x 6"Stainless SteelMetalStainless SteelNoneCast iron€11,844.59
B119NMDKMAA0087QFlange4" x 6"Stainless SteelMetalStainless SteelNoneCast iron€11,903.80
B119NMDLMAA0075QFlange4" x 6"Stainless SteelMetalStainless SteelNoneCast iron€11,903.81
B119NMDLMAA0075Flange4" x 6"Stainless SteelMetalStainless SteelNoneCast iron€11,844.59
B119NMDLMAA0094Flange4" x 6"Stainless SteelMetalStainless SteelNoneCast iron€11,844.59
B119NMDLMAA0125Flange4" x 6"Stainless SteelMetalStainless SteelNoneCast iron€11,844.59
B119NMDLMAA0120Flange4" x 6"Stainless SteelMetalStainless SteelNoneCast iron€11,844.59
B119NMDLMAA0105Flange4" x 6"Stainless SteelMetalStainless SteelNoneCast iron€11,950.27
B119NMDLMAA0130Flange4" x 6"Stainless SteelMetalStainless SteelNoneCast iron€11,950.27
B119RPDAMAA0140Flange6" x 8"Stainless SteelMetalStainless SteelNoneCast iron€32,687.35
B119RPDAMAA0110Flange6" x 8"Stainless SteelMetalStainless SteelNoneCast iron€32,687.35
B119RPDAMAA0090Flange6" x 8"Stainless SteelMetalStainless SteelNoneCast iron€32,979.02
B119RPDLMAA0030Flange6" x 8"Stainless SteelMetalStainless SteelNoneCast iron€32,687.35
C119QPDAMAA0245Flange6" x 8"Stainless SteelMetalStainless SteelNoneCast iron€23,964.60
B119RPDAMAA0075Flange6" x 8"Stainless SteelMetalStainless SteelNoneCast iron€32,687.35
B119PMDAMAA0110Flange4" x 6"Stainless SteelMetalStainless SteelNoneCast iron€15,498.97
B119NMDLMAA0080Flange4" x 6"Stainless SteelMetalStainless SteelNoneCast iron€11,950.27
B119NMDAMCE0150QFlange4" x 6"Stainless SteelMetalStainless SteelNoneCast iron€11,932.87
B119RPDAMAA0085Flange6" x 8"Stainless SteelMetalStainless SteelNoneCast iron€32,687.35
B119RPDAMAA0080Flange6" x 8"Stainless SteelMetalStainless SteelNoneCast iron€32,687.35
B119RPDAMAA0100Flange6" x 8"Stainless SteelMetalStainless SteelNoneCast iron€32,687.35
B119RPDAMAA0105Flange6" x 8"Stainless SteelMetalStainless SteelNoneCast iron€32,687.35
B119RPDAMAA0115Flange6" x 8"Stainless SteelMetalStainless SteelNoneCast iron€32,687.35
APOLLO VALVES -

12-200 Series Low Pressure Steam Heating Boiler Safety Valves

StyleModelMPNPrice
A12205031220503€637.02
B12205041220504€637.02
A12205051220505€637.02
A12205061220506€615.04
B12205071220507€637.02
A12205081220508€347.99
B1220508Q1220508Q€665.57
A12205141220514€637.02
A1220514P51220514P5€638.06
A1220514P5AQ1220514P5AQ€700.14
B12206081220608€514.93
APOLLO VALVES -

10-630 Series Safety Relief Valves

StyleModelFinishConnection TypeSizeHeightMaterialMax. Operating PressurePrice
A1063465------€209.36
B10634125NoneFNPT3/4"-Bronze150 psi€209.36
B10634150NoneFNPT3/4"133.35 mmBronze150 psi€209.36
B10634100NoneFNPT3/4"133.35 mmBronze150 psi€209.36
B1063430NoneFNPT3/4"133.35 mmBronze150 psi€118.18
B1063440NoneFNPT3/4"133.35 mmBronze150 psi€209.36
B1063450NoneFNPT3/4"133.35 mm--€205.21
B1063475NoneFNPT-133.35 mmBronze150 psi€209.36
B1063490NoneFNPT3/4"133.35 mmBronze150 psi€205.21
B1063480NoneFNPT3/4"133.35 mmBronze150 psi€209.36
12...1415

Relief Valves

Pressure relief valves are designed to control or release built-up pressure in the system which may otherwise damage pipelines and equipment. Raptor Supplies offers a wide range of relief valves including shut off, safety, drain & pressure valves from Apollo, Watts, Parker, Milton Industries, Hayward, Oil Safe, Campbell & more. Apollo safety relief valves are designed according to ASME Section IV standards for the protection of steam boilers. These bronze constructed valves feature metal to metal, PCTFE or elastomer O-ring seating, thereby having a wide pressure and temperature range. They are capable of withstanding a maximum pressure of 1200 PSI and are available in inlet sizes ranging from 1/2 to 3 inches. Watts adjustable relief valves are designed to release pressure (up to 200 PSI) when the set internal pressure is encountered in systems containing air, oil or water. Watts 1450F Series combination fill and relief valves feature a silicone disc to provide positive seating and leakproof operation. These valves are available in bronze, brass, iron, lead free bronze and lead free brass variants.