Unloader, Safety & Flow Control Valves

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Unloader, safety, and flow control valves are essential components in any pressure washing system. Unloader valves regulate pressure and allow your pump to bypass water when the trigger is released, while relief and safety valves provide protection against overpressure to safeguard pumps, hoses, and other equipment. Flow regulators play a complementary role by controlling and stabilizing water flow, which is particularly useful in multi-gun setups, chemical applications, and when using attachments that require consistent performance, helping ensure smooth, efficient, and reliable operation.

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Canpump

SKU: 043006

Canpump 1/2-in Unloader Valve - 4350 psi @ 21.1 US gpm

Chemical injector: No

Inlet: 1/2-in Female

Outlet: 1/2-in Female

Bypass: 1/2-in Female

MSRP:

Was:

Price Now:

$88.00

Out of stock
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P.A.

SKU: 042006

P.A. VB 85/160: 2300 psi @ 21 US gpm Unloader Valve

Chemical injector: No

Inlet: 1/2-in Female

Outlet: 1/2-in Female

Bypass: 1/2-in Female

MSRP:

Was:

Price Now:

$124.00

Out of stock
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Bertolini Pumps

SKU: 041003

Bertolini APR 25: 2500 psi @ 5.5 US gpm Unloader Valve

Chemical injector: No

Inlet: 1/2-in Male

Outlet: 3/8-in Male

Inlet Banjo Bolt: 3/8-in Male

Outlet Banjo Bolt: 3/8-in Male

MSRP:

Was:

Price Now:

$72.00
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Bertolini Pumps

SKU: 041007

Bertolini APR 40: 4000 psi @ 5.5 US gpm Unloader Valve

Chemical injector: No

Inlet: 1/2-in Male

Outlet: 3/8-in Male

Inlet Banjo Bolt: 1/2-in Male

Outlet Banjo Bolt: 3/8-in Male

MSRP:

Was:

Price Now:

$72.00
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P.A.

SKU: 041011

P.A. Pulsar Zero: 4050 psi @ 10.5 US gpm Flow-Sensitive Unloader Valve

Chemical injector: No

Inlet: 3/8-in Female

Outlet: 3/8-in Female

Bypass: 3/8-in Female

MSRP:

Was:

Price Now:

$184.00
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P.A.

SKU: 041018

P.A. VB 35: 2500 psi @ 6.5 US gpm Bolt-On Unloader Valve

Chemical injector: No

Inlet: 3/8-in Female

Outlet: 3/8-in Male

Inlet Banjo Bolt: 3/8-in Male

Outlet Banjo Bolt: 3/8-in Male

MSRP:

Was:

Price Now:

$75.00
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Canpump

SKU: 043005

Canpump Universal 3/8-in Unloader Valve - 4000 psi @ 6.6 US gpm, Easy Start

Chemical injector: No

Inlet: 3/8-in Female

Outlet: 3/8-in Male

Bypass: 3/8-in Female

MSRP:

Was:

Price Now:

$56.00
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Canpump

SKU: 043008

Canpump Unloader Valve - 4000 psi @ 6.6 US gpm, Easy Start, Outlet 3/8-in M NPT, Without Injector

Chemical injector: No

Inlet: 3/4-in Garden Hose Female

Outlet: 3/8-in Male NPT

Inlet Banjo Bolt: 1/2-in Male

Outlet Banjo Bolt: 3/8-in Male

MSRP:

Was:

Price Now:

$44.00

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P.A.

SKU: 041014

P.A. VS 310: 4500 psi @ 10.5 US gpm Safety/Relief Valve, 1 Inlet Port

Inlet: 3/8-in Female

Outlet: 3/8-in Female

MSRP:

Was:

Price Now:

$64.00
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Bertolini Pumps

SKU: 041005

Bertolini APR 30: 3000 psi @ 5.5 US gpm Unloader Valve

Chemical injector: No

Inlet: 1/2-in Male

Outlet: 3/8-in Male

Inlet Banjo Bolt: 1/2-in Male

Outlet Banjo Bolt: 3/8-in Male

MSRP:

Was:

Price Now:

$72.00

Out of stock
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P.A.

SKU: 043001

P.A. VB 200/150: 2175 psi @ 53 US gpm Unloader Valve

Chemical injector: No

Inlet: 1-in Female

Outlet: 1-in Female

Bypass: 1-in Female

MSRP:

Was:

Price Now:

$328.00
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Mecline

SKU: 041022

Mecline VRT3 Easy Start: 4060 psi @ 10.5 US gpm Unloader Valve

Chemical injector: No

Inlet: 3/8-in Female

Outlet: 3/8-in Female

Bypass: 3/8-in Female

MSRP:

Was:

Price Now:

$68.00

Nozzle Size	Flow	Operating Pressure Range (psi)
Orifice	Flow rate	362	435	507	580	652	725	797	870	942	1015
0.15 mm (0.006″)	L/min	0.03	0.033	0.036	0.038	0.04	0.043	0.045	0.047	0.049	0.05
0.15 mm (0.006″)	US gpm	0.008	0.009	0.009	0.01	0.011	0.011	0.012	0.012	0.013	0.013
0.20 mm (0.008″)	L/min	0.04	0.044	0.048	0.051	0.054	0.057	0.06	0.062	0.065	0.068
0.20 mm (0.008″)	US gpm	0.011	0.012	0.013	0.013	0.014	0.015	0.016	0.017	0.017	0.018
0.30 mm (0.012″)	L/min	0.068	0.075	0.081	0.086	0.091	0.096	0.101	0.105	0.11	0.114
0.30 mm (0.012″)	US gpm	0.018	0.02	0.021	0.023	0.024	0.025	0.027	0.028	0.029	0.03
0.40 mm (0.016″)	L/min	0.104	0.113	0.123	0.131	0.139	0.146	0.154	0.16	0.167	0.173
0.40 mm (0.016″)	US gpm	0.027	0.03	0.032	0.035	0.037	0.039	0.041	0.042	0.044	0.046
0.50 mm (0.020″)	L/min	0.114	0.125	0.135	0.144	0.153	0.161	0.169	0.176	0.183	0.19
0.50 mm (0.020″)	US gpm	0.03	0.033	0.036	0.038	0.04	0.043	0.045	0.047	0.048	0.05
0.60 mm (0.024″)	L/min	0.138	0.152	0.164	0.175	0.186	0.196	0.205	0.215	0.223	0.232
0.60 mm (0.024″)	US gpm	0.037	0.04	0.043	0.046	0.049	0.052	0.054	0.057	0.059	0.061
0.80 mm (0.032″)	L/min	0.165	0.181	0.195	0.209	0.221	0.233	0.245	0.256	0.266	0.276
0.80 mm (0.032″)	US gpm	0.044	0.048	0.052	0.055	0.058	0.062	0.065	0.068	0.07	0.073
1.00 mm (0.040″)	L/min	0.188	0.206	0.222	0.237	0.251	0.264	0.276	0.287	0.298	0.308
1.00 mm (0.040″)	US gpm	0.05	0.054	0.059	0.063	0.067	0.07	0.073	0.076	0.079	0.081
1.20 mm (0.048″)	L/min	0.207	0.227	0.245	0.262	0.278	0.293	0.307	0.32	0.332	0.343
1.20 mm (0.048″)	US gpm	0.054	0.06	0.065	0.069	0.073	0.077	0.081	0.085	0.088	0.091

Orifice	Contour based angle
0.10 / .004″	19.90°
0.15 / .006″	55.70°
0.20 / .008″	72.50°
0.30 / .012″	74.60°
0.40 / .016″	82.00°
0.50 / .020″	72.50°
0.60 / .024″	91.00°
0.80 / .032″	105.80°
1.00 / .040″	106.90°
1.20 / .048″	114.00°

Unloader, Safety & Flow Control Valves

Bolt-On Unloaders

Thread-On Unloaders

Flow Regulators

Safety & Relief Valves

Canpump 1/2-in Unloader Valve - 4350 psi @ 21.1 US gpm

P.A. VB 85/160: 2300 psi @ 21 US gpm Unloader Valve

Bertolini APR 25: 2500 psi @ 5.5 US gpm Unloader Valve

Bertolini APR 40: 4000 psi @ 5.5 US gpm Unloader Valve

P.A. Pulsar Zero: 4050 psi @ 10.5 US gpm Flow-Sensitive Unloader Valve

P.A. VB 35: 2500 psi @ 6.5 US gpm Bolt-On Unloader Valve

Canpump Universal 3/8-in Unloader Valve - 4000 psi @ 6.6 US gpm, Easy Start

Canpump Unloader Valve - 4000 psi @ 6.6 US gpm, Easy Start, Outlet 3/8-in M NPT, Without Injector

P.A. VS 310: 4500 psi @ 10.5 US gpm Safety/Relief Valve, 1 Inlet Port

Bertolini APR 30: 3000 psi @ 5.5 US gpm Unloader Valve

P.A. VB 200/150: 2175 psi @ 53 US gpm Unloader Valve

Mecline VRT3 Easy Start: 4060 psi @ 10.5 US gpm Unloader Valve

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