Do these valves prevent water hammer?

Yes, water hammer is a phenomenon that generates noise by shocks of high flow water in pipes when the fixture is closed suddenly. The bounce-back caused is called a water hammer. This shortcoming can be reduced by using the pressure reducing valves in piping systems.

Can these valves reduce high pressures?

Yes, for reducing high water pressures, users can install multiple reducing valves in series or parallel in the line. This cascading effect lowers the water pressure to safer values and protects fixtures.

How to know if the water pressure is high?

If the water flow through pipes causes a banging noise, it signifies that the pressure is excessive and needs to be regulated.

Are there any end fittings for installing Watts valves?

Yes, various end fitting configurations facilitate the installation and servicing of these pressure reducing valves. Union fittings of CPVC, solder, female threaded, Quick-Connect, PEX and press end connections and water meter threads can be used for installation.

Why are disc guides and seats critical in valves?

These two components are most critical in the path of high-pressure water. They handle and regulate excessive water velocity and volatile water conditions in pipings.

Why are pressure reducing valves necessary?

Watts water pressure regulator valves protect connected piping and fixtures against blowouts and leakages that are caused by high water pressure. They also maintain the water pressure by regulating the fluctuating water supply at the intake side.

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Home
Plumbing
Pressure and Temperature Control Valves
Water Pressure Reducing Valves

WATTS Water Pressure Reducing Valves

ANSI approved valves used to maintain a preset inlet pressure to prevent damage to the piping systems from excessive water / steam pressure. Intended for both domestic and industrial applications in oil lines, autoclaves and single radiators

Filter

Water pressure reducing valves are devices used in plumbing systems to control and reduce the pressure of water flowing through pipes. They are installed where the incoming water pressure...Read more

WATTS -

Water Pressure Regulator Valves

Style	Model	connection type	height	Adjustable Pressure Range	body material	Max. Pressure	Max. Temp.	Price (ex. VAT)
A	1/2 LF25AUB-HP-Z3	FIP	7"	75.0 psi to 125.0 psi	Lead Free Brass	300 psi	160°F	€242.30
B	1 LFU5B-LP-Z3	FNPT Union x FNPT	7 3/8"	10.0 psi to 35.0 psi	Lead Free Brass	300 psi	160°F	€437.71

WATTS -

Water Pressure Reducing Valve, Lead Free Brass, 25 to 75 psi

Style	Model	height	Pipe Size	Max. Pressure	Max. Temp.	Adjustable Pressure Range	Preset Pressure Settings	Type	Price (ex. VAT)
A	11/4 25AUB-GG-Z3	11.437"	1 1/4"	300 psi	160°F	25 psi to 75 psi	50 psi	Standard	€572.06
B	11/2 25AUB-GG-Z3	11.938"	1 1/2"	300 psi	160°F	25 psi to 75 psi	50 psi	Standard	€825.54

WATTS -

LFN223B Series Water Pressure Reducing Valves

Style	Model	height	connection type	body material	Max. Pressure	Max. Temp.	Adjustable Pressure Range	Pressure Adjustment Range	Price (ex. VAT)
A	LFN223M2-B 2 1/2	13 5/8"	FIP	Lead Free Brass	300 psi	160°F	25.0 psi to 75.0 psi	25 psi to 75 psi	€3,369.68
B	LFN223M1-B 3	16 7/8"	FIP	Lead Free Brass	300 psi	160°F	25.0 psi to 75.0 psi	25 psi to 75 psi	€4,854.04

WATTS -

N55B Series Water Pressure Reducing Valves

Style	Model	MPN	Price (ex. VAT)
A	N55BM1 1 IN	N55BM1 1 IN	€254.22	RFQ
A	N55BM1-DU-CPVC 3/4 IN	N55BM1-DU-CPVC 3/4 IN	€302.30	RFQ

WATTS -

LF127W Series Water Pressure Reducing Valves

Style	Model	body material	max. operating temp.	valve design	Max. Pressure	Adjustable Pressure Range	Inlet Type	Pressure Setting Range	Outlet Type	Price (ex. VAT)
A	LF127W-208 3	-	-	-	-	-	-	-	-	€14,033.49	RFQ
B	LF127W-206 3	Copper Silicon Alloy	160°F	Standard	175 psi	25 psi to 100 psi	Female Threaded	3.4 Bar	Female Threaded	€13,114.54	RFQ

WATTS -

X65B Series Water Pressure Reducing Valves

Style	Model	body material	max. operating temp.	Disc Material	Style	Price (ex. VAT)
A	X65BU-070 3/4	-	-	-	-	€389.22	RFQ
B	X65BDU-HP 1 1/2	-	-	-	-	€2,324.12	RFQ
C	X65BDU 1 1/4	-	-	-	-	€1,185.18	RFQ
D	X65B 1 1/2	-	-	-	-	€1,596.59	RFQ
E	X65BDU-S-G 1 1/4	-	-	-	-	€1,244.35	RFQ
F	X65BU 1 1/2	-	-	-	-	€878.97	RFQ
G	X65BUS 1 1/2	-	-	-	-	€878.97	RFQ
H	X65B-G 1 1/2	-	-	-	-	€1,674.23	RFQ
G	X65BUS-G 1 1/2	-	-	-	-	€1,723.20	RFQ
I	X65BDU-PEX 1/2	-	-	-	-	€439.15	RFQ
J	X65B-HP 1/2	-	-	-	-	€475.18	RFQ
K	X65BDU 2	-	-	-	-	€2,335.21	RFQ
L	X65BDU-G 2	-	-	-	-	€2,455.38	RFQ
M	X65BDU-S 2	-	-	-	-	€2,335.21	RFQ
G	X65BU-QC 1/2	-	-	-	-	€391.98	RFQ
G	X65BU-QC 1	-	-	-	-	€501.06	RFQ
G	X65BU-QC 3/4	-	-	-	-	€428.03	RFQ
N	X65BDU-QC 1/2	-	-	-	-	€439.15	RFQ
O	X65BDU-S 3/4	-	-	-	-	€474.27	RFQ
G	X65BUS-G-HP 1 1/4	-	-	-	-	€1,371.91	RFQ
F	X65BU 1 1/4	-	-	-	-	€617.49	RFQ
F	X65BU 1	-	-	-	-	€162.39	RFQ
F	X65BU 1/2	-	-	-	-	€151.56	RFQ
H	X65B-20 3/4	-	-	-	-	€426.16	RFQ
A	X65BU-070 1	-	-	-	-	€504.77	RFQ

WATTS -

U5B-Z3 Series Water Pressure Reducing Valves

Style	Model	MPN	Price (ex. VAT)
A	U5B-G-HP-Z3 3/4	U5B-G-HP-Z3 3/4	€1,251.76	RFQ
A	U5B-G-Z3 1/2	U5B-G-Z3 1/2	€868.07	RFQ
A	U5B-G-Z3 3/4	U5B-G-Z3 3/4	€1,011.36	RFQ
B	U5B-GG-HP-Z3 3/4	U5B-GG-HP-Z3 3/4	€1,347.88	RFQ
B	U5B-GG-Z3 1	U5B-GG-Z3 1	€1,690.86	RFQ
B	U5B-GG-Z3 1 1/4	U5B-GG-Z3 1 1/4	€2,969.38	RFQ
C	U5B-HP-Z3 1/2	U5B-HP-Z3 1/2	€1,032.61	RFQ
D	U5B-S-Z3 1 1/4	U5B-S-Z3 1 1/4	€3,143.22	RFQ
D	U5B-S-Z3 1/2	U5B-S-Z3 1/2	€868.98	RFQ
D	U5B-S-Z3 2	U5B-S-Z3 2	€5,021.72	RFQ
C	U5B-Z3 11/4	U5B-Z3 11/4	€1,380.51	RFQ

WATTS -

LFU5B-Z3 Series Water Pressure Reducing Valves

Style	Model	body material	Disc Material	Inlet Type	Outlet Type	valve design	Max. Pressure	Adjustable Pressure Range	Pressure Setting Range	Price (ex. VAT)
A	LF5BM3-HP-Z6 3/4	Brass	Reinforced EPDM	Female Threaded	Male Threaded	Standard	20.7 Bar	25 psi to 75 psi	3.4 Bar	€957.05
B	LF5M3-Z6 3/4	Bronze	Buna N	Male Threaded	Female Threaded	Standard	20.7 Bar	25 psi to 75 psi	3.4 Bar	€427.31

WATTS -

25AUB-Z3 Series Water Pressure Reducing Valves

Style	Model	MPN	Price (ex. VAT)
A	25AUB-QC-Z3 1/2	25AUB-QC-Z3 1/2	€523.24	RFQ
B	25AUB-Z3 2	25AUB-Z3 2	€1,351.57	RFQ

WATTS -

LFN45B Series Water Pressure Reducing Valves

Style	Model	body material	connection type	height	Max. Pressure	Adjustable Pressure Range	Type	Disc Material	Inlet Type	Price (ex. VAT)
A	LFN45BM1-DU-EZ 3/4"	-	FNPT	6.062"	400 psi	25 psi to 75 psi	Standard	-	-	€294.22
B	LFN45BM1-DU	-	Union x Joint	6 1/4"	300 psi	25 psi to 75 psi	Standard	-	-	€241.99
C	LFN45BM1-PRESS 1/2	-	Press	6 1/8"	400 psi	25 psi to 75 psi	Standard	-	-	€296.24
C	LFN45BM1-PRESS 1	-	Press	6 1/8"	400 psi	25 psi to 75 psi	Standard	-	-	€393.46
C	LFN45BM1-PRESS 3/4	-	Press	6 1/8"	400 psi	25 psi to 75 psi	Standard	-	-	€332.92
D	LFN45BM1-DU-CPVC	-	Union x Joint	6 1/4"	300 psi	25 psi to 75 psi	Standard	-	-	€129.96
B	LFN45BM1-DU	-	Union x Joint	6 1/4"	300 psi	25 psi to 75 psi	Standard	-	-	€358.21
D	LFN45BM1-DU-CPVC	-	Union x Joint	6 1/4"	300 psi	25 psi to 75 psi	Standard	-	-	€130.74
E	LFN45BM1-DU 1/2	Brass	-	-	300 psi	25 psi to 75 psi	Kit	Reinforced EPDM	Union Joint	€293.03
F	LFN45BM1-U-S	Brass	-	-	300 psi	25 psi to 75 psi	-	Reinforced EPDM	Union Solder	€190.44
G	LFN45BDU-QC-M1 1	Cast Copper Silicon Alloy	-	-	400 psi	25 psi to 75 psi	Kit	Elastomer	Quick Connect	€412.32
H	LFN45BM1 (W/PRESS) 1	Cast Copper Silicon Alloy	-	-	400 psi	25 psi to 75 psi	-	Elastomer	Press	€190.68	RFQ
I	LFN45BM1 (W/PRESS) 3/4	Cast Copper Silicon Alloy	-	-	27.6 Bar	25 psi to 75 psi	-	Elastomer	Press	€170.51	RFQ
H	LFN45BM1 (W/PRESS) 1/2	Cast Copper Silicon Alloy	-	-	400 psi	25 psi to 75 psi	-	Elastomer	Press	€258.79	RFQ
J	LFN45BM1-U-QC 1	Cast Copper Silicon Alloy	-	-	400 psi	25 psi to 75 psi	Kit	Elastomer	Quick Connect	€420.63
K	LFN45BM1-U-QC 3/4	Cast Copper Silicon Alloy	-	-	27.6 Bar	25 psi to 75 psi	Kit	Elastomer	Quick Connect	€114.64
K	LFN45BDU-SXPEX-M1 3/4	Cast Copper Silicon Alloy	-	-	27.6 Bar	25 psi to 75 psi	Kit	Elastomer	Union Solder	€115.55
L	LFN45BDU-QC-M1 3/4	Cast Copper Silicon Alloy	-	-	27.6 Bar	25 psi to 75 psi	Kit	Elastomer	Quick Connect	€315.24
M	LFN45BDU-SXPEX-M1 1	Cast Copper Silicon Alloy	-	-	400 psi	25 psi to 75 psi	Kit	Elastomer	Union Solder	€148.37
N	LFN45BM1-U 1/2	Copper Silicon Alloy	-	-	300 psi	25 psi to 75 psi	-	EPDM	Female Threaded	€244.97
O	LFN45BM1 1	Copper Silicon Alloy	-	-	400 psi	25 psi to 75 psi	Kit	EPDM	Female Threaded	€282.87
N	LFN45BM1-U 1	Copper Silicon Alloy	-	-	400 psi	25 psi to 75 psi	Kit	EPDM	Female Threaded	€137.38
P	LFN45BM1-DU 3/4	Copper Silicon Alloy	-	-	20.7 Bar	25 psi to 75 psi	Kit	Elastomer	Union Joint	€270.89
Q	LFN45BM1 3/4	Copper Silicon Alloy	-	-	27.6 Bar	25 psi to 75 psi	-	EPDM	Female Threaded	€237.57
R	LFN45BM1-U-S 3/4	Copper Silicon Alloy	-	-	20.7 Bar	25 psi to 75 psi	-	Elastomer	Socket	€116.05

WATTS -

LFN250 Series Water Pressure Reducing Valves

Style	Model	Pressure Setting Range	body material	valve design	Disc Material	Max. Pressure	Adjustable Pressure Range	Inlet Type	Outlet Type	Price (ex. VAT)
A	LFN250B-Z2-020 3/4	1.4 Bar	Iron	Standard	EPDM	17.2 Bar	25 psi to 75 psi	Female Threaded	Female Threaded	€489.99
A	LFN250B 3/4	3.4 Bar	Iron	Standard	EPDM	17.2 Bar	25 psi to 75 psi	Female Threaded	Female Threaded	€489.99

WATTS -

Rough In Kits

Style	Model	body material	max. operating temp.	Disc Material	Style	Price (ex. VAT)
A	LFX65B-U-QC-RIK 1	Copper Silicon Alloy	180°F	Reinforced EPDM	Standard	€237.57	RFQ
A	LFX65BDU-PEX-RIK 1/2	Copper Silicon Alloy	180°F	Reinforced EPDM	Standard	€208.94	RFQ
A	LFX65BDU-CPVC-RIK 1	Copper Silicon Alloy	180°F	Reinforced EPDM	Standard	€273.65	RFQ
A	LFX65BU-PEX-RIK 1	Copper Silicon Alloy	180°F	Reinforced EPDM	Standard	€237.57	RFQ
A	LFX65BU-PEX-RIK 3/4	Copper Silicon Alloy	180°F	Reinforced EPDM	Standard	€203.38	RFQ
A	LFX65BDU-PEX-RIK 1	Copper Silicon Alloy	180°F	Reinforced EPDM	Standard	€273.65	RFQ
A	LFX65BDU-PEX-RIK 3/4	Copper Silicon Alloy	180°F	Reinforced EPDM	Standard	€225.59	RFQ
A	LFX65BU-CPVC-RIK 1	Copper Silicon Alloy	180°F	Reinforced EPDM	Standard	€237.57	RFQ
A	LFX65BU-CPVC-RIK 3/4	Copper Silicon Alloy	180°F	Reinforced EPDM	Standard	€203.38	RFQ
A	LFX65BDU-CPVC-RIK 3/4	Copper Silicon Alloy	180°F	Reinforced EPDM	Standard	€225.59	RFQ

WATTS -

LFN55B Series Water Pressure Reducing Valves

Style	Model	Pipe Size	connection type	height	body material	max. operating temp.	valve design	Max. Pressure	Max. Temp.	Price (ex. VAT)
A	LFN55B-DU-S 1 1/4 IN	-	-	-	Brass	180°F	Standard	400 psi	-	€840.35	RFQ
B	LFN55B-U 1 1/4 IN	1 1/4"	NPT Union x FNPT	6"	-	-	-	400 psi	160°F	€618.82
B	2 LF N55BU	2"	NPT Union x FNPT	6"	-	-	-	400 psi	160°F	€871.77

WATTS -

RK-LFN250 Series Water Pressure Reducing Valve Repair Kit

Style	Model	MPN	Price (ex. VAT)
A	LFRK N250 1/2	LFRK N250 1/2	€142.33
B	LFRK N250 3/4	LFRK N250 3/4	€148.13

WATTS -

LFX65B Series Water Pressure Reducing Valves

Style	Model	body material	max. operating temp.	valve design	Disc Material	Style	Inlet Thread Type	Lead	Inlet Connection	Price (ex. VAT)
A	LFX65B 1	-	-	-	-	-	-	-	-	€566.68	RFQ
B	LFX65B 2	-	-	-	-	-	-	-	-	€2,582.98	RFQ
C	LFX65B-G 1	-	-	-	-	-	-	-	-	€594.42
D	LFX65B-CART-HP 1 1/2-2	Brass	-	Standard	Reinforced EPDM	-	-	Not Present	-	€1,627.08
E	LFX65B-CART-STD 1/2-3/4	Brass	-	Standard	Reinforced EPDM	-	-	Not Present	-	€275.52
F	LFX65B CARTASSY-STD 1	Copper Silicon Alloy	180°F	-	Reinforced EPDM	Standard	NPT	-	Female Threaded	€325.40	RFQ
G	LFX65B-DU-QC-RIK 3/4	Copper Silicon Alloy	180°F	-	Reinforced EPDM	Standard	-	-	-	€225.59	RFQ
G	LFX65B-DU-QC-RIK 1/2	Copper Silicon Alloy	180°F	-	Reinforced EPDM	Standard	-	-	-	€208.94	RFQ
G	LFX65B-DU-QC-RIK 1	Copper Silicon Alloy	180°F	-	Reinforced EPDM	Standard	-	-	-	€273.65	RFQ
H	LFX65B-CART-HP 1/2-3/4	Copper Silicon Alloy	180°F	-	Reinforced EPDM	Standard	NPT	-	-	€342.96	RFQ
F	LFX65B-CART-STD 1 1/4	Copper Silicon Alloy	180°F	-	Reinforced EPDM	Standard	NPT	-	Female Threaded	€720.15	RFQ
H	LFX65B-CARTASSY-HP 1 1/4	Copper Silicon Alloy	180°F	-	Reinforced EPDM	Standard	NPT	-	-	€899.53	RFQ

WATTS -

223 Series Water Pressure Reducing Valves

Style	Model	MPN	Price (ex. VAT)
A	223 1 1/4	223 1 1/4	€1,270.25	RFQ
A	223 2	223 2	€2,406.80	RFQ
A	223-B-LP 1/2	223-B-LP 1/2	€1,209.21	RFQ
A	223-LP 1/2	223-LP 1/2	€1,150.03	RFQ
A	223-Z3 1	223-Z3 1	€1,388.56	RFQ
A	223-Z3 1 1/4	223-Z3 1 1/4	€2,808.52	RFQ
A	223-Z3 3/4	223-Z3 3/4	€1,013.23	RFQ

WATTS -

RK-N45B Series Water Pressure Reducing Valve Kit

Style	Model	MPN	Price (ex. VAT)
A	RK N45B-EZ-N55B	RK N45B-EZ-N55B	€122.23
B	RK N45B-EZ-N55BM1	RK N45B-EZ-N55BM1	€53.09

WATTS -

RK-LF223 Series Pressure Reducing Valve Kit

Style	Model	MPN	Price (ex. VAT)
A	LFRK 223N 1 1/2	LFRK 223N 1 1/2	€402.45
B	LFRK 223N 2	LFRK 223N 2	€657.65
C	LFRK 223N 3/4	LFRK 223N 3/4	€111.98

WATTS -

N35B Series Water Pressure Reducing Valves

Style	Model	MPN	Price (ex. VAT)
A	N35BDUS-Z3-M1 1	N35BDUS-Z3-M1 1	€1,077.13	RFQ
A	N35BU-M1 3/4	N35BU-M1 3/4	€624.03	RFQ

WATTS -

LFU5B Series Water Pressure Reducing Valves

Style	Model	body material	max. operating temp.	height	connection type	Max. Pressure	Adjustable Pressure Range	Inlet Type	Type	Price (ex. VAT)
A	3/4 LF U5BZ3	-	-	6 7/8"	FNPT Union x FNPT	300 psi	25 psi to 75 psi	-	High Capacity	€956.78
B	1/2 LFU5B-LP-Z3	-	-	5 7/8"	-	300 psi	10 psi to 35 psi	-	Low Pressure	€576.15
C	3/4 LFU5B-LP-Z3	-	-	6 7/8"	-	300 psi	10 psi to 35 psi	-	Low Pressure	€1,057.12
D	LFU5B-Z3	-	-	8 3/8"	FNPT	300 psi	25 psi to 75 psi	-	Standard	€2,540.05
E	1-1/4 LFU5B-Z3-LP	-	-	9 3/8"	FNPT	300 psi	10 psi to 35 psi	-	Low Pressure	€3,062.92
E	1-1/2 LFU5B-Z3-LP	-	-	8 3/8"	FNPT	300 psi	10 psi to 35 psi	-	Low Pressure	€3,924.44
F	LFU5B-LP-Z3	-	-	9 3/8"	FNPT	300 psi	10 psi to 35 psi	-	Low Pressure	€4,691.40
A	LFU5B-Z3 1	-	-	7 3/8"	FNPT Union x FNPT	300 psi	25 psi to 75 psi	-	High Capacity	€958.88
G	LFU5B-S Z3 1 1/2	Cast Copper Silicon Alloy	160°F	-	-	300 psi	25 psi to 75 psi	Union Solder	-	€4,788.77	RFQ
H	LFU5B-S Z3 1 1/4	Cast Copper Silicon Alloy	160°F	-	-	300 psi	25 psi to 75 psi	Union Solder	-	€4,254.41
I	LFU5B-QC-Z3 3/4	Cast Copper Silicon Alloy	-	-	-	20.7 Bar	25 psi to 75 psi	Quick Connect	Kit	€1,416.30
J	LFU5B-QC-Z3 1	Cast Copper Silicon Alloy	160°F	-	-	300 psi	25 psi to 75 psi	Quick Connect	Kit	€2,089.33
K	LFU5B-LP-Z3 3/4	Copper Silicon Alloy	-	-	-	20.7 Bar	10 psi to 35 psi	Female Threaded	-	€1,073.25
L	LFU5B-LP-Z3 1/2	Copper Silicon Alloy	180°F	-	-	300 psi	10 psi to 35 psi	Female Threaded	-	€883.16
M	LFU5B-Z3 1	Copper Silicon Alloy	160°F	-	-	300 psi	25 psi to 75 psi	Female Threaded	-	€1,399.89
N	LFU5B-Z3 2	Copper Silicon Alloy	160°F	-	-	300 psi	25 psi to 75 psi	Female Threaded	-	€2,959.63	RFQ
N	LFU5B-Z3 1 1/2	Copper Silicon Alloy	160°F	-	-	300 psi	25 psi to 75 psi	Female Threaded	-	€2,243.74	RFQ
O	LFU5B-Z3 3/4	Copper Silicon Alloy	-	-	-	20.7 Bar	25 psi to 75 psi	Female Threaded	-	€1,434.31
N	LFU5B-Z3 1/2	Copper Silicon Alloy	160°F	-	-	300 psi	25 psi to 75 psi	Female Threaded	-	€836.92

WATTS -

LF25AUB-Z3 Series Water Pressure Reducing Valves

Style	Model	body material	height	Max. Pressure	Disc Material	Inlet Type	Outlet Type	Pressure Setting Range	Adjustable Reduced Pressure Range	Price (ex. VAT)
A	1/2 LF 25 AUB Z3	-	7"	300 psi	-	-	-	-	-	€357.99
A	3/4 LF 25 AUB-Z3	-	8"	300 psi	-	-	-	-	-	€314.58
A	LF 25AUB-Z3 1	-	9"	300 psi	-	-	-	-	-	€471.59
A	11/4 LF 25AUBZ3	-	9 1/2"	300 psi	-	-	-	-	-	€896.27
A	11/2 LF 25AUBZ3	-	9 1/2"	300 psi	-	-	-	-	-	€1,195.77
A	2 LF 25AUBZ3	-	11 1/4"	300 psi	-	-	-	-	-	€1,818.74
B	1/2 LF25AUB-GG-Z3	-	9.437"	300 psi	-	-	-	-	-	€254.69
C	3/4 LF25AUB-GG-Z3	-	9.437"	300 psi	-	-	-	-	-	€270.54
D	1 LF25AUB-GG-Z3	-	10.437"	300 psi	-	-	-	-	-	€322.93
E	2 LF25AUB-GG-Z3	-	13.688"	300 psi	-	-	-	-	-	€1,182.85
F	3/4 LF25AUB-HP-Z3	-	7"	300 psi	-	-	-	-	-	€458.73
F	LF25AUB-HP-Z3 1	-	8"	300 psi	-	-	-	-	-	€428.74
G	LF25AUB-DU-Z3 3/4	Brass	-	20.7 Bar	Reinforced EPDM	Female Threaded	Union Joint	3.4 Bar	-	€537.14
H	LF25AUB-G-HP-Z3 3/4	Brass	-	20.7 Bar	Reinforced EPDM	Union Joint	Female Threaded	3.4 Bar	-	€635.46
I	LF25AUB-S-DU-G-HP-Z3 3/4	Brass	-	20.7 Bar	Reinforced EPDM	Union Solder	Union Solder	3.4 Bar	-	€730.38
J	LF25AUB-LP-Z9 3/4	Brass	-	20.7 Bar	Reinforced EPDM	-	-	-	-	€696.15
J	LF25AUB-S-G-HP-Z3 3/4	Brass	-	20.7 Bar	Reinforced EPDM	Union Solder	Female Threaded	3.4 Bar	-	€635.46
K	LF25AUB-DU-Z3 2	Cast Copper Silicon Alloy	-	300 psi	EPDM	Female Threaded	Female Threaded	3.4 Bar	25 psi to 75 psi	€2,335.21	RFQ
L	LF25AUB-G-HP-Z3 2	Cast Copper Silicon Alloy	-	300 psi	EPDM	Union Joint	Female Threaded	3.4 Bar	75 psi to 125 psi	€2,889.91	RFQ
M	LF25AUB-GG-LP-Z3 2	Cast Copper Silicon Alloy	-	300 psi	EPDM	Union Female Threaded	Female Threaded	2.07 Bar	10 psi to 35 psi	€2,557.11	RFQ
M	LF25AUB-GG-Z3 2	Cast Copper Silicon Alloy	-	300 psi	EPDM	Union Joint	Female Threaded	3.4 Bar	25 psi to 75 psi	€2,497.93	RFQ
N	LF25AUB-DU-G-Z3 2	Cast Copper Silicon Alloy	-	300 psi	EPDM	Union Joint	Union Joint	3.4 Bar	25 psi to 75 psi	€2,497.93	RFQ
N	LF25AUB-DU-G-HP-Z3 2	Cast Copper Silicon Alloy	-	300 psi	EPDM	Union Joint	Union Joint	3.4 Bar	75 psi to 125 psi	€3,034.11	RFQ
O	LF25AUB-DU-GG-Z3 2	Cast Copper Silicon Alloy	-	300 psi	EPDM	Union Joint	Union Joint	3.4 Bar	25 psi to 75 psi	€2,625.51	RFQ
P	LF25AUB-S-Z3 1 1/2	Cast Copper Silicon Alloy	-	300 psi	EPDM	Socket	Female Threaded	3.4 Bar	25 psi to 75 psi	€1,062.97

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Features

Watts water pressure regulators have iron / bronze / lead-free brass / copper / copper silicon alloy construction for minimising wear while preventing chances of leakages.
Selected models have enlarged diaphragm and seat support for delivering high flow capacity while handling high water pressures.
They feature a high-temperature diaphragm and stainless steel strainer for handling hot water and filtering contaminations, respectively.
Their field adjustable downstream pressure set point allows for quick calibration depending upon the flow requirement.

Working Mechanism

The direct acting type valves have internal spring loaded diaphragm which connects to a disc that modulates outlet flow controlling pressure.
High pressure water that enters the valve is constricted inside the valve body.
This constricting action is controlled by a disc and an adjustable spring loaded diaphragm.
Even if the input supply pressure fluctuates, this diaphragm & disc combination ensures a constant water flow at the outlet.
The spring tension controls the outlet water pressure which can be increased / decreased by loading or unloading the valve spring.
In case the downstream water pressure is above the set pressure, the diaphragm inside the valve compresses the spring.
If the downstream water pressure is under the set pressure, the valve spring pushes the valve to increase the flow from the regulator.
These valves are installed mid line before fixtures and after backflow preventers and water supply stops. They have inlet and outlet ports that are installed in series with the pipe.