£ GBPChange Country- Sign in
- Submit RFQ
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
Watts water pressure regulator valves reduce incoming water pressure to a safe constant downstream level. They are ideal for irrigation, agricultural, healthcare, production, manufacturing and food & beverage processing applications.
A
B
C
D
E| Style | Model | Body Material | Disc Material | Inlet Connection | Inlet Size | Inlet Type | Max. Working Pressure | Min. Temp. | Outlet Connection | Price (inc. GST) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | LFRC105-THDXUT 1 | SGD 205.21 | |||||||||
| B | RC105-CEFXCEF 3/4 | SGD 143.54 | |||||||||
| B | RC105-CEFXCEF 1 | SGD 204.06 | |||||||||
| C | LFRC105-PEXXPEX 1 | SGD 204.06 | |||||||||
| D | LFRC105-THDXUT 3/4 | SGD 144.13 | |||||||||
| E | LFRC105-PEXXPEX 3/4 | SGD 143.54 |
A
B| Style | Model | Height | Inlet Size | Length | Outlet Size | Price (inc. GST) | |
|---|---|---|---|---|---|---|---|
| A | LFN223M2-B 2 1/2 | SGD 4353.94 | |||||
| B | LFN223M1-B 3 | SGD 6271.87 |
A
B| Style | Model | Price (inc. GST) | |
|---|---|---|---|
| A | 25AUB-QC-Z3 1/2 | SGD 676.08 | RFQ |
| B | 25AUB-Z3 2 | SGD 1746.35 | RFQ |
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V| Style | Model | Body Material | Connection Type | Disc Material | Height | Inlet Connection | Inlet Size | Inlet Type | Item | Price (inc. GST) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | LFN45BM1-DU-EZ 3/4" | SGD 380.16 | |||||||||
| B | LFN45BM1-PRESS 1 | SGD 508.38 | |||||||||
| C | LFN45BM1-DU-CPVC | SGD 167.92 | |||||||||
| C | LFN45BM1-DU-CPVC | SGD 168.93 | |||||||||
| D | LFN45BM1-DU | SGD 462.84 | |||||||||
| E | LFN45BM1-DU | SGD 312.67 | |||||||||
| F | LFN45BM1-PRESS 3/4 | SGD 430.17 | |||||||||
| B | LFN45BM1-PRESS 1/2 | SGD 382.77 | |||||||||
| G | LFN45BM1-U-S | SGD 246.07 | |||||||||
| H | LFN45BM1-DU 1/2 | SGD 378.62 | |||||||||
| I | LFN45BDU-QC-M1 3/4 | SGD 407.32 | |||||||||
| J | LFN45BDU-SXPEX-M1 3/4 | SGD 149.30 | |||||||||
| K | LFN45BM1 (W/PRESS) 1 | SGD 246.38 | RFQ | ||||||||
| L | LFN45BM1 (W/PRESS) 3/4 | SGD 220.31 | RFQ | ||||||||
| M | LFN45BM1 (W/PRESS) 1/2 | SGD 334.39 | RFQ | ||||||||
| N | LFN45BM1-U-QC 1 | SGD 543.49 | |||||||||
| O | LFN45BM1-U-QC 3/4 | SGD 148.12 | |||||||||
| P | LFN45BDU-QC-M1 1 | SGD 532.75 | |||||||||
| Q | LFN45BDU-SXPEX-M1 1 | SGD 191.71 | |||||||||
| R | LFN45BM1-U 1 | SGD 177.50 | |||||||||
| S | LFN45BM1 1 | SGD 365.50 | |||||||||
| T | LFN45BM1-DU-PEXXPEX | SGD 237.47 | |||||||||
| R | LFN45BM1-U 1/2 | SGD 316.53 | |||||||||
| U | LFN45BM1-DU 1 | SGD 457.50 | |||||||||
| V | LFN45BM1-U-S 3/4 | SGD 149.95 |
A
B| Style | Model | Mfr. Series | Price (inc. GST) | |
|---|---|---|---|---|
| A | 3-M115FDB1A1B0H-0 | SGD 6966.15 | RFQ | |
| A | 3-M115FBB1A1B0H-0 | SGD 8576.36 | RFQ | |
| B | 2-M115FDA1A1B0H-0 | SGD 5026.88 | RFQ | |
| A | 2-M115FDB1A1B0H-0 | SGD 5903.15 | RFQ | |
| A | 2-M115FCB1A1B0H-0 | SGD 7713.34 | RFQ | |
| A | 2.5-M115FDA1A1B0H-0 | SGD 5672.53 | RFQ | |
| A | 2.5-M115FBB1A1B0H-0 | SGD 8062.52 | RFQ | |
| A | 2.5-M115FAB1A1B0H-0 | SGD 7761.60 | RFQ | |
| A | 2.5-M115FCB1A1B0H-0 | SGD 9200.93 | RFQ | |
| A | 3-M115FDA1A1B0H-0 | SGD 6092.23 | RFQ | |
| A | 2-M115FBA1A1B0H-0 | SGD 6188.85 | RFQ | |
| A | 3-M115FCB1A1B0H-0 | SGD 9584.19 | RFQ | |
| A | 2-M115FBB1A1B0H-0 | SGD 7267.63 | RFQ | |
| A | 2-M115FAB1A1B0H-0 | SGD 6492.62 | RFQ | |
| A | 2.5-M115FBA1A1B0H-0 | SGD 6983.74 | RFQ | |
| A | 2.5-M115FAA1A1B0H-0 | SGD 6682.81 | RFQ | |
| A | 2.5-M115FCA1A1B0H-0 | SGD 8124.99 | RFQ | |
| A | 2.5-M115FDB1A1B0H-0 | SGD 6548.77 | RFQ | |
| A | 3-M115FBA1A1B0H-0 | SGD 7500.42 | RFQ | |
| A | 3-M115FAA1A1B0H-0 | SGD 6733.92 | RFQ | |
| A | 3-M115FCA1A1B0H-0 | SGD 8505.41 | RFQ | |
| A | 2-M115FAA1A1B0H-0 | SGD 5416.65 | RFQ | |
| A | 2-M115FCA1A1B0H-0 | SGD 6637.40 | RFQ | |
| A | 6-M115FCA1A1B0H-0 | SGD 15384.11 | RFQ | |
| A | 6-M115FDA1A1B0H-0 | SGD 11903.11 | RFQ |
A
B| Style | Model | Price (inc. GST) | |
|---|---|---|---|
| A | LFN250B-Z2-020 3/4 | SGD 633.11 | |
| B | LFN250B 3/4 | SGD 633.11 |
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O| Style | Model | Adjustable Reduced Pressure Range | Body Material | Connection Type | Height | Inlet Connection | Inlet Size | Inlet Type | Length | Price (inc. GST) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 3/4 LF U5BZ3 | SGD 1236.25 | |||||||||
| B | 1/2 LFU5B-LP-Z3 | SGD 744.44 | |||||||||
| C | 3/4 LFU5B-LP-Z3 | SGD 1365.90 | |||||||||
| B | LFU5B-Z3 | SGD 3281.99 | |||||||||
| B | 1-1/4 LFU5B-Z3-LP | SGD 3957.59 | |||||||||
| D | 1-1/2 LFU5B-Z3-LP | SGD 5070.75 | |||||||||
| E | LFU5B-LP-Z3 | SGD 6061.74 | |||||||||
| F | LFU5B-Z3 3/4 | SGD 1853.27 | |||||||||
| G | LFU5B-Z3 1 | SGD 1238.96 | |||||||||
| H | LFU5B-LP-Z3 3/4 | SGD 1386.74 | |||||||||
| I | LFU5B-QC-Z3 3/4 | SGD 1829.99 | |||||||||
| J | LFU5B-LP-Z3 1/2 | SGD 1141.13 | |||||||||
| K | LFU5B-S Z3 1 1/2 | SGD 6187.55 | RFQ | ||||||||
| L | LFU5B-Z3 1 | SGD 1808.79 | |||||||||
| M | LFU5B-Z3 2 | SGD 3824.12 | RFQ | ||||||||
| M | LFU5B-Z3 1 1/2 | SGD 2899.12 | RFQ | ||||||||
| N | LFU5B-QC-Z3 1 | SGD 2699.61 | |||||||||
| O | LFU5B-S Z3 1 1/4 | SGD 5497.10 | |||||||||
| M | LFU5B-Z3 1/2 | SGD 1081.39 |
A
B| Style | Model | Height | Pipe Size | Price (inc. GST) | |
|---|---|---|---|---|---|
| A | 11/2 25AUB-GG-Z3 | SGD 1066.68 | |||
| B | 11/4 25AUB-GG-Z3 | SGD 739.16 |
A
B| Style | Model | Connection Type | Height | Inlet Size | Length | Outlet Size | Pressure Adjustment Range | Price (inc. GST) | |
|---|---|---|---|---|---|---|---|---|---|
| A | 1/2 LF25AUB-HP-Z3 | SGD 313.07 | |||||||
| B | 1 LFU5B-LP-Z3 | SGD 565.57 |
A
B
C
D
EF
G
H
I| Style | Model | Adjustable Reduced Pressure Range | Body Material | Connection Type | Disc Material | Height | High Pressure Reduced Pressure Range | Inlet Connection | Inlet Size | Price (inc. GST) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 1/2 LF 25 AUB Z3 | SGD 462.55 | |||||||||
| B | LF25AUB-QC-Z3 3/4 | SGD 674.90 | |||||||||
| C | LF25AUB-Z3 3/4 | SGD 348.26 | |||||||||
| D | LF25AUB-Z3 (W/PRESS) 1/2 | SGD 445.36 | RFQ | ||||||||
| D | LF25AUB-Z3 (W/PRESS) 3/4 | SGD 382.77 | RFQ | ||||||||
| D | LF25AUB-Z3 (W/PRESS) 1 1/4 | SGD 1283.83 | |||||||||
| E | LF25AUB-G-HP-Z3 3/4 | SGD 821.08 | |||||||||
| B | LF25AUB-LP-Z9 3/4 | SGD 899.49 | |||||||||
| F | LF25AUB-Z3 1/2 D | SGD 513.68 | |||||||||
| G | LF25AUB-S-DU-G-HP-Z3 3/4 | SGD 943.72 | |||||||||
| B | LF25AUB-DU-PEXXPEX 3/4 | SGD 818.26 | |||||||||
| A | 3/4 LF 25 AUB-Z3 | SGD 406.47 | |||||||||
| B | LF25AUB-DU-QC-Z3 3/4 | SGD 1192.12 | |||||||||
| H | LF25AUB-DU-Z3 3/4 | SGD 694.03 | |||||||||
| C | LF25AUB-LP-Z3 3/4 | SGD 664.13 | |||||||||
| I | LF25AUB-HP-Z6 1 | SGD 1045.72 | |||||||||
| D | LF25AUB-Z3 (W/PRESS) 1 | SGD 562.97 | RFQ | ||||||||
| C | LF25AUB-Z3 1 1/2 | SGD 1512.91 | |||||||||
| D | LF25AUB-Z3 (W/PRESS) 1 1/2 | SGD 1631.63 | |||||||||
| D | LF25AUB-Z3 (W/PRESS) 2 | SGD 2156.64 | RFQ | ||||||||
| F | LF25AUB-Z3 3/4 D | SGD 678.09 | |||||||||
| B | LF25AUB-S-G-HP-Z3 3/4 | SGD 821.08 | |||||||||
| C | LF25AUB-Z3 1 1/4 | SGD 918.50 | |||||||||
| C | LF25AUB-Z3 1/2 | SGD 421.53 | |||||||||
| C | LF25AUB-Z3 2 | SGD 1928.71 | RFQ |
AB
C
D
E
F
G
H
I
J
K
L
M| Style | Model | Adjustable Reduced Pressure Range | Body Material | Connection Type | Disc Material | Height | High Pressure Reduced Pressure Range | Inlet Size | Inlet Thread Type | Price (inc. GST) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | LF223-S 1/2 | SGD 682.34 | |||||||||
| B | LF223-S-B-LP 1/2 | SGD 2570.59 | RFQ | ||||||||
| C | LF223-B-LP 3/4 | SGD 1957.56 | |||||||||
| D | LF223-S-LP 3/4 | SGD 2429.58 | |||||||||
| D | LF223-S-B-HP 3/4 | SGD 3036.41 | |||||||||
| D | LF223-S-B 3/4 | SGD 2040.22 | |||||||||
| D | LF223-S-Z3 3/4 | SGD 2138.16 | |||||||||
| D | LF223-S 3/4 | SGD 755.42 | |||||||||
| E | LF223-B-Z3 3/4 | SGD 1637.67 | |||||||||
| E | LF223-HP 3/4 | SGD 1783.41 | |||||||||
| D | LF223-S-HP 3/4 | SGD 2304.21 | |||||||||
| E | LF223-LP 3/4 | SGD 1783.41 | |||||||||
| C | LF223-B 3/4 | SGD 1497.93 | |||||||||
| F | LF223-S 3/4 | SGD 732.20 | |||||||||
| G | LF223-LP 1/2 | SGD 1781.02 | |||||||||
| G | LF223 1 | SGD 1086.42 | |||||||||
| G | LF223 2 | SGD 3322.59 | |||||||||
| H | LF223-S 1 | SGD 1009.99 | |||||||||
| I | LF223-S 1 1/4 | SGD 2032.16 | |||||||||
| J | LF223-S 1 1/2 | SGD 2048.26 | |||||||||
| K | LF223-S 2 | SGD 3072.76 | |||||||||
| L | 1/2 LF 223 | SGD 535.11 | |||||||||
| D | LF223-S-B-LP 3/4 | SGD 2429.58 | |||||||||
| M | 11/4 LF 223 | SGD 1705.40 | |||||||||
| C | LF223 3/4 | SGD 589.31 |
Watts LFN55B-M1 Series water pressure-reducing valves are used in plumbing systems to regulate and control water pressure. These valves are employed in residential, commercial and industrial settings. They are offered in lead-free brass, brass and lead-free copper silicon alloy construction for safeguarding the water supply from harmful contaminants. These valves are equipped with a stainless steel strainer to prevent debris and sediment from entering the downstream plumbing system. They have thermoplastic seats for a tight & reliable seal to prevent water leakage. These valves are integrated with thermal expansion bypass to allow controlled release of excess pressure, resulting from thermal expansion in the water distribution system. They are available in female threaded and union joints inlet types.
A
B
CD
E
F
G
H
I
J
K
L
M
N
O
P| Style | Model | Body Material | Disc Material | Inlet Connection | Inlet Size | Inlet Type | Length | Material | Max. Working Pressure | Price (inc. GST) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 1/2 LF N55BUM1 | SGD 231.74 | |||||||||
| A | 3/4 LF N55BUM1 | SGD 258.45 | |||||||||
| B | LFN55BM1-DU-G 3/4 IN | SGD 457.50 | |||||||||
| C | LFN55BM1-DU-PEX-G 1 | SGD 511.89 | |||||||||
| D | LFN55BM1-DUS-G 1 | SGD 511.89 | |||||||||
| E | LFN55BM1-DU-CPVC 1 | SGD 478.12 | |||||||||
| F | LFN55BM1-DU-G 1 | SGD 511.89 | |||||||||
| D | LFN55BM1-US-G 1 | SGD 458.12 | |||||||||
| G | LFN55BM1-U-G 1 | SGD 458.12 | |||||||||
| H | LFN55BM1-DU 1 IN | SGD 555.72 | |||||||||
| I | LFN55BM1-DU-CPVC 3/4 | SGD 379.24 | |||||||||
| D | LFN55BM1-G 1 | SGD 436.82 | |||||||||
| J | LFN55BM1-DU-S 3/4 IN | SGD 439.58 | |||||||||
| K | LFN55BM1 3/4 IN | SGD 354.76 | |||||||||
| D | LFN55BM1-U-070 3/4 | SGD 413.01 | |||||||||
| L | LFN55BM1-DU 1/2 IN | SGD 402.55 | |||||||||
| M | LFN55BM1 1/2 IN | SGD 350.02 | |||||||||
| N | LFN55BM1-DU 3/4 IN | SGD 439.58 | |||||||||
| O | LFN55BM1 U 3/4 | SGD 183.97 | |||||||||
| P | LFN55BM1-U 1 IN | SGD 238.18 | |||||||||
| D | LFN55BM1-U-070 1 | SGD 480.62 |
AB
C| Style | Model | Inlet Size | Material | Max. Working Pressure | Min. Temp. | Outlet Size | Price (inc. GST) | |
|---|---|---|---|---|---|---|---|---|
| A | 1" LFN45BDU-EZ-M1 | SGD 444.56 | ||||||
| B | LFN45BU-070-M1 1 | SGD 410.88 | ||||||
| C | LFN45BU-LP-M1 3/4 | SGD 378.62 |
A
B| Style | Model | Mfr. Series | Price (inc. GST) | |
|---|---|---|---|---|
| A | RK 25AUB 1 1/2 | SGD 219.08 | ||
| B | LFRK N223M2 2 1/2 | SGD 857.79 |
A
B
C
D
E| Style | Model | Body Material | Disc Material | Inlet Connection | Inlet Size | Inlet Type | Outlet Connection | Outlet Size | Outlet Type | Price (inc. GST) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | LFN45B-DU 1 1/4 | SGD 1091.79 | RFQ | ||||||||
| B | LFN45BU 1 1/2 | SGD 1499.11 | RFQ | ||||||||
| C | LFN45B (W/PRESS) 1 1/4 | SGD 974.28 | RFQ | ||||||||
| D | LFN45B (W/PRESS) 1 1/2 | SGD 1506.91 | RFQ | ||||||||
| C | LFN45B (W/PRESS) 2 | SGD 2046.47 | RFQ | ||||||||
| E | LFN45B-DU-S 1 1/4 | SGD 1016.53 | RFQ |
A
B
C
D
E
F
G
H| Style | Model | Body Material | Disc Material | Inlet Connection | Inlet Size | Inlet Type | Max. Working Pressure | Min. Temp. | Outlet Connection | Price (inc. GST) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | LFN45B-EZM1-DU 3/4 | SGD 389.43 | |||||||||
| B | LFN45BM1-DU-EZ-G 3/4 | SGD 440.78 | |||||||||
| C | LFN45BM1-DU-EZ-GG 3/4 | SGD 574.57 | |||||||||
| D | LFN45BDU-EZ-PEXXPEX-M1 3/4 | SGD 415.71 | |||||||||
| E | LFN45B-EZM1-DU 1 | SGD 420.44 | |||||||||
| F | LFN45BM1-DU-EZ-GG 1 | SGD 674.90 | |||||||||
| G | LFN45BM1-DU-EZ-G 1 | SGD 475.39 | |||||||||
| H | LFN45BDU-EZ-PEXXPEX-M1 1 | SGD 420.44 |
A
B
C| Style | Model | Inlet Size | Outlet Size | Price (inc. GST) | |
|---|---|---|---|---|---|
| A | LFF127W-206 | SGD 22966.86 | |||
| B | LFF127W-210 4 | SGD 22590.45 | RFQ | ||
| B | LFF127W-110 4 | SGD 22590.45 | RFQ | ||
| C | LFF127W-206 3 | SGD 18237.70 | RFQ | ||
| C | LFF127W-208 4 | SGD 22590.45 | RFQ | ||
| C | LFF127W-206 4 | SGD 22583.30 | RFQ |
A
B
C
D
E
FG
H
I
J
K| Style | Model | Connection Type | Disc Material | Height | Inlet Size | Inlet Type | Item | Length | Material | Price (inc. GST) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | LFX65BU-PEX-RIK 1/2 | SGD 240.09 | RFQ | ||||||||
| B | 3/4 LF 223 | SGD 698.80 | |||||||||
| C | 1" LFN55BM1-DU-PEX | SGD 353.62 | |||||||||
| D | 1/2" LFN55BM1-DU-PEX | SGD 334.81 | |||||||||
| E | LFX65BU 1/2 | SGD 212.11 | |||||||||
| F | LFN223FM2 3 | SGD 8417.34 | RFQ | ||||||||
| G | 1/2 LF U5BZ3 | SGD 692.66 | |||||||||
| H | 1/2 1156F-PRESS | SGD 280.53 | |||||||||
| I | 1" LFN55BM1-U | SGD 364.37 | |||||||||
| J | LF127W-206 | SGD 18716.82 | |||||||||
| K | LFU5B-LP-Z3 | SGD 7099.17 |
A| Style | Model | Inlet Size | Price (inc. GST) | |
|---|---|---|---|---|
| A | LFX65BU-CPVC-RIK 1 | SGD 306.96 | RFQ | |
| A | LFX65B-U-QC-RIK 1 | SGD 306.96 | RFQ | |
| A | LFX65BU-PEX-RIK 1 | SGD 306.96 | RFQ | |
| A | LFX65BDU-PEX-RIK 1 | SGD 353.58 | RFQ | |
| A | LFX65BDU-CPVC-RIK 1 | SGD 353.58 | RFQ | |
| A | LFX65BDU-PEX-RIK 1/2 | SGD 269.97 | RFQ | |
| A | LFX65BU-PEX-RIK 3/4 | SGD 262.79 | RFQ | |
| A | LFX65BDU-PEX-RIK 3/4 | SGD 291.48 | RFQ | |
| A | LFX65BDU-CPVC-RIK 3/4 | SGD 291.48 | RFQ | |
| A | LFX65BU-CPVC-RIK 3/4 | SGD 262.79 | RFQ |
A
BC| Style | Model | Length | Material | Pipe Size | Price (inc. GST) | |
|---|---|---|---|---|---|---|
| A | LFN55B-DU-S 1 1/4 IN | SGD 1085.81 | RFQ | |||
| B | LFN55B-U 1 1/4 IN | SGD 799.58 | ||||
| C | 2 LF N55BU | SGD 1126.40 |
A
B
C
D
E
F
G
H
I
J
K
L| Style | Model | Body Material | Inlet Size | Item | Max. Working Pressure | Min. Temp. | Outlet Size | Price (inc. GST) | |
|---|---|---|---|---|---|---|---|---|---|
| A | LFX65B 1 | SGD 732.20 | RFQ | ||||||
| B | LFX65B 2 | SGD 3337.46 | RFQ | ||||||
| C | LFX65B-G 1 | SGD 768.05 | |||||||
| D | LFX65B-CART-HP 1 1/2-2 | SGD 2102.35 | |||||||
| E | LFX65B-CART-STD 1/2-3/4 | SGD 355.99 | |||||||
| F | LFX65B CARTASSY-STD 1 | SGD 420.44 | RFQ | ||||||
| G | LFX65B-DU-QC-RIK 3/4 | SGD 291.48 | RFQ | ||||||
| H | LFX65B-DU-QC-RIK 1/2 | SGD 269.97 | RFQ | ||||||
| I | LFX65B-DU-QC-RIK 1 | SGD 353.58 | RFQ | ||||||
| J | LFX65B-CART-HP 1/2-3/4 | SGD 443.14 | RFQ | ||||||
| K | LFX65B-CART-STD 1 1/4 | SGD 930.51 | RFQ | ||||||
| L | LFX65B-CARTASSY-HP 1 1/4 | SGD 1162.27 | RFQ |
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.
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.
If the water flow through pipes causes a banging noise, it signifies that the pressure is excessive and needs to be regulated.
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.
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.
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.