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Air Delights Commercial Restroom Products

Wilkins Reduced Pressure Principle Assembly

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Model 375 (Sizes 2-1/2" - 10")

Model 375 (Sizes 2-1/2" - 10")

Reduced Pressure Principle Assembly Backflow Preventer

Designed for installation on potable water lines to protect against both backsiphonage and backpressure of contaminated water into the potable water supply. The Model 375 provides protection where a potential health hazard exists. Ideal for use where lead-free* valves are required

SKU Description 10" Price Qty
10-375 10" 10-375 Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Flanged NRS $12,492.65
10-375OSYSB 10" 375OSY W/ STAINLESS BOLTS LEAD FREE $13,961.74
10-375G 10" 10-375G Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Grooved NRS x Grooved NRS $12,696.90
10-375LBSE 10" 10-375LBSE Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves, BS10E Flanges $6,606.30
10-375BSE 10" 10-375BSE Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves, BS10E Flanges $12,560.77
10-375L 10" 10-375L Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves $9,166.70
10-375OSYFS 10" 10-375OSYFS Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Flanged OSY, Strainer $14,928.70
10-375OSYRH 10" 10-375OSYRH Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Flanged OSY, Right Hand GV $12,692.40
10-375OSYFSC 10" 10-375OSYFSC Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Flanged OSY, Epoxy Coated Strainer $15,350.87
10-375OSY 10" 10-375OSY Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Flanged OSY $12,692.40
10-375FG 10" 10-375FG Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Grooved NRS $12,696.90
10-375FS 10" 10-375FS Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Flanged NRS, Strainer $14,725.61
10-375FSC 10" 10-375FSC Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Flanged NRS, Epoxy Coated Strainer $15,150.98
10-375LBSE-LCU 10" 10-375LBSE-LCU Reduced Pressure Principle Assy, Lead-Free, Flanged Body, F x F, BS10E Flanges, Less Gate Valves, Less RV $6,405.88
10-375OSYG 10" 10-375OSYG Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Grooved OSY x Grooved OSY $12,692.40
SKU Repair Kits 10" Price Qty
RK8-350 RK8-350 Repair Kit - 375/475 Checks Only $216.26
3711-CU-XL 8"-10" CNTRL ASSY, Lead-Free $1,256.87
RK8-375R 8" RK8-375R Repair Kit - 375/475 Relief Valve, Rubber Only $76.55
RK8-375 8" RK8-375 Repair Kit - 375/475 Relief Valve Complete $236.90
SKU Description 8" Price Qty
8-375 8" 8-375 Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Flanged NRS $8,861.69
8-375OSYRH 8" 375OSY RIGHT HAND GV LEAD FREE $9,480.73
8-375OSYGF 8" 8-375OSYGF Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Grooved OSY x Flanged OSY $9,480.73
8-375G 8" 8-375G Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Grooved NRS x Grooved NRS $8,861.74
8-375LBSE 8" 8-375LBSE Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves, BS10E Flanges $5,803.37
8-375BSE 8" 8-375BSE Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves, BS10E Flanges $8,874.04
8-375L 8" 8-375L Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves $6,764.64
8-375OSYFG 8" 8-375OSYFG Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Grooved OSY $9,480.73
8-375OSYFS 8" 8-375OSYFS Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Flanged OSY, FS Strainer $10,876.03
8-375OSYFSC 8" 8-375OSYFSC Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Flanged OSY, Epoxy Coated Strainer $11,016.96
8-375OSY 8" 8-375OSY Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Flanged OSY $9,480.67
8-375FG 8" 8-375FG Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Grooved NRS $9,006.65
8-375MU 8" 8-375MU Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Flanged NRS, Mueller Gates $9,999.06
8-375FS 8" 8-375FS Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Flanged NRS, FS Strainer $10,246.91
8-375FSC 8" 8-375FSC Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Flanged NRS, Epoxy Coated Strainer $10,397.84
8-375OSYSB 8" 375OSY W/ STAINLESS BOLTS LEAD FREE $10,428.89
8-375OSYG 8" 8-375OSYG Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Grooved OSY x Grooved OSY $9,480.73
SKU Repair Kits 8" Price Qty
RK8-350 RK8-350 Repair Kit - 375/475 Checks Only $216.26
3711-CU-XL 8"-10" CNTRL ASSY, Lead-Free $1,256.87
RK8-375R 8" RK8-375R Repair Kit - 375/475 Relief Valve, Rubber Only $76.55
RK8-375 8" RK8-375 Repair Kit - 375/475 Relief Valve Complete $236.90
SKU Description 6" Price Qty
6-375 6" 6-375 Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Flanged NRS $5,267.78
6-375LEU 6" 375L Z375LY014 LEAD FREE $2,981.60
6-375L 6" 6-375L Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves $3,888.06
6-375BSE 6" 6-375BSE Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves, BS10E Flanges $5,281.97
6-375LBSE 6" 6-375LBSE Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves, BS10E Flanges $2,981.60
6-375LSACF 6" 6-375LSACF Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves, Floating Check $3,114.07
6-375LFS 6" 6-375LFS Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves, Strainer $4,422.42
6-375GF 6" 6-375GF Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Grooved NRS x Flanged NRS $5,267.90
6-375G 6" 6-375G Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Grooved NRS x Grooved NRS $5,267.90
6-375OSYGF 6" 6-375OSYGF Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Grooved OSY x Flanged OSY $5,751.38
6-375OSYG 6" 6-375OSYG Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Grooved OSY x Grooved OSY $5,751.38
6-375OSYPIG 6" 6-375OSYPIG Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Grooved OSY x Grooved PI $5,509.56
6-375PIOSY 6" 6-375PIOSY Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged PI x Flanged OSY $5,751.38
6-375OSYPIFG 6" 6-375OSYPIFG Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Grooved PI $5,509.56
6-375LFSC 6" 6-375LFSC Reduced Pressure Principle Assy, Lead-Free, Flanged Body, F x F, Less Gate Valves, Epoxy Coated Strainer $4,695.50
6-375FSC 6" 6-375FSC Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Flanged NRS, Epoxy Coated Strainer $6,074.95
6-375FS 6" 6-375FS Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Flanged NRS, FS Strainer $5,608.76
6-375MU 6" 6-375MU Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Flanged NRS, Mueller Gates $5,988.98
6-375FG 6" 6-375FG Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Grooved NRS $5,267.90
6-375OSY 6" 6-375OSY Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Flanged OSY $5,751.44
6-375OSYFSC 6" 6-375OSYFSC Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Flanged OSY, Epoxy Coated Strainer $6,558.68
6-375OSYFS 6" 6-375OSYFS Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Flanged OSY, FS Strainer $6,069.55
6-375OSYFG 6" 6-375OSYFG Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Grooved OSY $5,751.38
6-375OSYSB 6" 6-375OSYSB Reduced Pressure Principle Assy, Lead-Free, Flanged OSY x Flanged OSY, SS Flange Bolts & Nuts $6,170.14
SKU Repair Kits 6" Price Qty
3707-CU-XL Wilkins Relief Valve Assy $1,022.32
RK212-375R 6" RK212-375R Repair Kit - 375/475 Relief Valve, Rubber Only $69.64
RK212-375 6" RK212-375 Repair Kit - 375/475 Relief Valve Complete $100.34
RK6-350 6" RK6-350 Repair Kit - 375/475 Checks Only $195.17
SKU Description 4" Price Qty
4-375 4" 4-375 Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Flanged NRS $3,738.10
4-375OSYSB 4" 375 W/OSY SS FLG BLT LEAD FREE $3,976.96
4-375L 4" 4-375L Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves $2,546.75
4-375LBSD 4" 4-375LBSD Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves, BS10D Flanges $2,017.98
4-375BSE 4" 4-375BSE Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves, BS10E Flanges $3,782.68
4-375LBSE 4" 4-375LBSE Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves, BS10E Flanges $2,206.96
4-375LSACF 4" 4-375LSACF Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves, Floating Check $2,017.52
4-375LFS 4" 4-375LFS Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves, FS Strainer $2,826.20
4-375GF 4" 4-375GF Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Grooved NRS x Flanged NRS $3,738.17
4-375G 4" 4-375G Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Grooved NRS x Grooved NRS $3,738.17
4-375OSYGF 4" 4-375OSYGF Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Grooved OSY x Flanged OSY $3,976.96
4-375OSYG 4" 4-375OSYG Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Grooved OSY x Grooved OSY $3,976.96
4-375OSYPIG 4" 4-375OSYPIG Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Grooved OSY x Grooved PI $3,857.71
4-375PIOSY 4" 4-375PIOSY Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged PI x Flanged OSY $3,976.96
4-375OSYFG 4" 4-375OSYFG Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Grooved OSY $3,976.96
4-375LEU 4" 375L Z375LY012 LEAD FREE $2,546.69
4-375OSY-AG 4" 375OSY WITH AIR GAP LEAD FREE $4,080.41
4-375OSYRH 4"375OSY W/RIGHT HAND GV LEAD FREE $3,976.96
4-375LBSE-LCU 4" 4-375LBSE-LCU Reduced Pressure Principle Assy, Lead-Free, Flanged Body, F x F, BS10E Flanges, Less Gate Valves, Less RV $1,911.88
4-375FSC 4" 4-375FSC Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Flanged NRS, Epoxy Coated Strainer $4,231.96
4-375FS 4" 4-375FS Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Flanged NRS, FS Strainer $3,995.45
4-375FG 4" 4-375FG Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Grooved NRS $3,738.17
4-375OSY 4" 4-375OSY Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Flanged OSY $3,976.96
4-375OSYFSC 4" 4-375OSYFSC Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Flanged OSY, Epoxy Coated Strainer $4,470.62
4-375OSYFS 4" 4-375OSYFS Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Flanged OSY, FS Strainer $4,229.69
4-375PIOSYG 4" 4-375PIOSYG Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Grooved PI x Grooved OSY $3,976.96
SKU Repair Kits 4" Price Qty
3707-CU-XL Wilkins Relief Valve Assy $1,022.32
RK212-375R 6" RK212-375R Repair Kit - 375/475 Relief Valve, Rubber Only $69.64
RK212-375 6" RK212-375 Repair Kit - 375/475 Relief Valve Complete $100.34
RK4-350 4" RK4-350 Repair Kit - 375/475 Checks Only $116.74
SKU Description 3" Price Qty
3-375 3" 3-375 Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Flanged NRS $2,758.25
3-375BV 3" 375 W/BALL VALVES $3,408.65
3-375OSYRH 3" 3-375OSYRH Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Flanged OSY, Right Hand GV $3,163.56
3-375OSYFG 3" 3-375OSYFG Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Grooved OSY $3,163.56
3-375PIOSY 3" 3-375PIOSY Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged PI x Flanged OSY $3,163.56
3-375L 3" 3-375L Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves $1,769.87
3-375BSE 3" 3-375BSE Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves, BS10E Flanges $2,895.90
3-375LBSE 3" 3-375LBSE Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves, BS10E Flanges $1,447.37
3-375G 3" 3-375G Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Grooved NRS x Grooved NRS $2,758.19
3-375OSYGF 3" 3-375OSYGF Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Grooved OSY x Flanged OSY $3,163.56
3-375OSYFS 3" 3-375OSYFS Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Flanged OSY, FS Strainer $3,311.75
3-375OSYFSC 3" 3-375OSYFSC Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Flanged OSY, Epoxy Coated Strainer $3,463.30
3-375OSYSB 3" 375 W/OSY SS FLG BLT LEAD FREE $3,496.48
3-375LEU 3" 375L Z375LY010 LEAD FREE $1,447.37
3-375OSY-AG 3" 375OSY WITH AIR GAP LEAD FREE $3,267.02
3-375FSC 3" 3-375FSC Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Flanged NRS, Epoxy Coated Strainer $3,057.83
3-375FS 3" 3-375FS Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Flanged NRS, FS Strainer $2,913.86
3-375FG 3" 3-375FG Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Grooved NRS $2,758.19
3-375OSY 3" 3-375OSY Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Flanged OSY $3,163.56
3-375OSYG 3" 3-375OSYG Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Grooved OSY x Grooved OSY $3,163.56
SKU Repair Kits 3" Price Qty
3707-CU-XL Wilkins Relief Valve Assy $1,022.32
RK212-375R 6" RK212-375R Repair Kit - 375/475 Relief Valve, Rubber Only $69.64
RK212-375 6" RK212-375 Repair Kit - 375/475 Relief Valve Complete $100.34
RK4-350 4" RK4-350 Repair Kit - 375/475 Checks Only $116.74
SKU Description 2-1/2" Price Qty
212-375 2 1/2" 212-375 Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Flanged NRS $2,648.83
212-375LEU 2 1/2" 375L Z375LY009 LEAD FREE $1,524.25
212-375G 2 1/2" 212-375G Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Grooved NRS x Grooved NRS $2,648.89
212-375LBSE 2 1/2" 212-375LBSE Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves, BS10E Flanges $1,524.25
212-375BSE 2 1/2" 212-375BSE Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves, BS10E Flanges $2,753.09
212-375L 2 1/2" 212-375L Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged x Flanged, Less Gate Valves $1,769.52
212-375OSYFG 2 1/2" 212-375OSYFG Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Grooved OSY $3,007.90
212-375OSYFS 2 1/2" 212-375OSYFS Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Flanged OSY, FS Strainer $3,098.87
212-375OSYFSC 2 1/2" 212-375OSYFSC Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Flanged OSY, Epoxy Coated Strainer $3,250.20
212-375OSY 2 1/2" 212-375OSY Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged OSY x Flanged OSY $3,007.84
212-375FG 2 1/2" 212-375FG Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Grooved NRS $2,648.89
212-375FSC 2 1/2" 212-375FSC Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Flanged NRS, Strainer, Epoxy Coated $2,890.86
212-375FS 2 1/2" 212-375FS Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Flanged NRS x Flanged NRS, FS Strainer $2,746.49
212-375OSYSB 2-1/2" 375 W/OSY SS FLG BOLT LEAD FREE $3,308.68
212-375OSYG 2 1/2" 212-375OSYG Reduced Pressure Principle Assy, Lead-Free, Flanged Body, Grooved OSY x Grooved OSY $3,007.90
SKU Repair Kits 2-1/2" Price Qty
3707-CU-XL Wilkins Relief Valve Assy $1,022.32
RK212-375R 6" RK212-375R Repair Kit - 375/475 Relief Valve, Rubber Only $69.64
RK212-375 6" RK212-375 Repair Kit - 375/475 Relief Valve Complete $100.34
RK4-350 4" RK4-350 Repair Kit - 375/475 Checks Only $116.74
Documents
Specification Sheet PDF icon
Installation and Maintenance Instructions 2 1/2" thru 6 PDF icon
Installation and Maintenance Instructions 8" & 10" PDF icon
Repair Parts 2-1/2" & 3" PDF icon
Repair Parts 4" - 10" PDF icon
Videos
Model 375 (8" & 10") Repair Video YouTube Videos
Model 375 (2 1/2" & 3") Repair Video YouTube Videos
Model 375 (4" & 6") Repair Video YouTube Videos


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