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General Pump Unloaders

Flow Control Unloaders
Name Description Quantity Price Order
ZK3.1 Unloader Valve

General Pump ZK3.1 Pressure Washer Unloader Valve
More Info

*Inlet=3/8" FNPT
*Outlet=3/8" MNPT
*Bypass=3/4" MNPT
*Pressure=0-1450 PSI
*Flow sensitive

(Old PWP # ADI-350)

Flow Rate/Part No.
$90.00

ZK5.0 Unloader Valve

General Pump ZK5.0 Pressure Washer Unloader Valve
More Info

*Inlet=3/8" FNPT
*Outlet=3/8" MNPT
*Bypass=3/4" MNPT
*Pressure=1450-3000 PSI
*Flow Sensitive
*General Pump # ZK5.0 / ZK50

(Old PWP # ADI-342)

Flow Rate/Part No.
$95.40

ZK7 Unloader Valve

General Pump ZK7 Pressure Washer Unloader Valve
More Info

*Inlet=3/8" FNPT
*Outlet=3/8" MNPT
*Bypass=3/8" FNPT
*Pressure=0-3000 PSI
*Flow sensitive

(Old PWP # ADI-1368)

Flow Rate/Part No.
$104.95

ZK9 Unloader Valve

General Pump ZK9 Pressure Washer Unloader Valve
More Info

*Inlet=1/2" FNPT
*Outlet=1/2" MNPT
*Bypass=1/2" FNPT
*Max Pressure=5800 PSI
*Flow sensitive

(Old PWP # ADI-348)

Flow Rate/Part No.
$570.00



Flow Control Unloader Repair Kits
Name Part No. Description Quantity Price Order
Repair Kit for Unloader Valves


GEN-32502 *Maintenance Kit
*For General Pump / Interpump #ZK5 Series
*Fits ZK50, ZK51, ZK52, ZK53
*General Pump Kit #58 


(Old PWP # ADI-346)
$61.25

Repair Kit for Unloader Valves


GEN-32503 *Complete Overhaul Kit
*For General Pump / Interpump #ZK5 Series
*Fits ZK50, ZK51, ZK52, ZK53
*General Pump Kit #60


(Old PWP # ADI-347)
$88.95

Repair Kit for Unloader Valve


GEN-32505 *Maintenance kit
*For Generals Interpump #ZK9 Series
Repair Kit 121

(Old PWP # ADI-349)
$240.00

Repair Kit for Unloader Valves


GEN-32510 *Maintenance
*For Generals Interpump #ZK3 Series
* ZK30, ZK31, ZK32, ZK33

(Old PWP # ADI-354)
$59.00

Repair Kit for Unloader Valves


GEN-32511 *Complete rebuild
*For Generals Interpump #ZK3 Series
* ZK30, ZK31, ZK32, ZK33

(Old PWP # ADI-355)
$95.00



Direct Mount Unloaders (eliminates need for bypass fittings & bypass hose).
Name Part No. Description Quantity Price Order
ZKW21L Unloader Valve, Control Set, & Injector

General Pump ZKW221L Direct Mount Pressure Washer Unloader Valve

More Info

GEN-32462 *Trapped Pressure Control Set Unloader with Chemical Injector
*Inlet=1/2 -14 BSPP-F
*Outlet=3/8-19 BSPP-M
*Max Pressure=3000 PSI
*Flow Rate=2.9-4.5 GPM
*Max Temp=200 F
*Direct mount used on General Pump models T811, TS1011, TS1311, TS1331, TS1511, TS1711, TS2011, T9131, T9211

(Old PWP # ADI-103)
$129.50

General Pump ZOKR1 Unloader Valve, Control Set, Injector, Pressure Gauge, Filter


GEN-32466 *Trapped Pressure Control Set Unloader with Chemical Injector
*Inlet=1/2" FNPT
*Outlet=3/8" *Chemical injector, pressure gauge, and filter
*3/8" F x M22
*1/4" Hose barb
*1000 PSI maximum pressure
*2.3 GPM flow rate
*Control set
$124.95

ZKW1 Unloader Valve

General Pump ZKW1 Direct Mount Pressure Washer Unloader Valve

More Info

GEN-32467 *Trapped Pressure Control Set Unloader with Chemical Injector
*Inlet=3/8" FNPT
*Outlet=3/8" MNPT
*2.2 mm chemical injector
*Max Pressure=1600 PSI
*Flow Rate 2-3 GPM
*Max Temp=165 F
*Direct mount used on General Pump TT551, TT561, TT741, TT751, TT901, TT931, T9051, TT9061, TT9071, TS1021

(Old PWP # ADI-108)
$119.95

General Pump YVB75KDMN Unloader Valve



More Info

GEN-32492 *Trapped Pressure Unloader
*Inlet=1/2 FNPT
*Outlet=3/8" FNPT
*Rated 3250 PSI
*Max 3650 PSI
*Max 8 GPM
*Max Temp=195° F
*Direct mount used on General Pumps EZ, 47 Series, and 63 Series.
*Includes mounting bolts and washers

(Old PWP # ADI-1463)
$79.65

ZKW21 Unloader Valve, Control Set & Injector

General Pump ZKW21 Direct Mount Pressure Washer Unloader Valve

More Info

GEN-32446 *Trapped Pressure Control Set Unloader with Chemical Injector
*Inlet=1/2 FNPT
*Outlet=3/8" MPNT
*Max Pressure=3000 PSI
*Flow Rate=2.9-4.5 GPM
*Max Temp=200° F
*Direct mount used on General Pump models TS1371, TT1411, TT1611, TT9351, TT9441, T9971, T991, All EZ Pumps.

(Old PWP # ADI-10005)
$134.95

General Pump Unloader



More Info

GEN-32451 *YVB135KDM
*Max PSI=2600
*6.5 GPM
*Built in By Pass
*Output=3/8" MNPT
*Inlet=3/8" FNPT
*Max Temp 195 F
*Direct mount on for TT/TP Series 51 Pumps.

(Old PWP # ADI-10114)
$70.11



Trapped pressure unloaders.
Name Part No. Description Quantity Price Order
PULSAR4KHP Unloader Valve



More Info

GEN-32448 General Pump
*Trapped Pressure Unloader Valve
*Inlet=3/8" FNPT
*Outlet=3/8" FNPT
*Bypass=3/8" FNPT
*Max Pressure=4500 PSI
*Max GPM=10.5 GPM
*Max Temp=194° F

(Old PWP # ADI-101)
$47.95

YVB7K Unloader Valve



More Info

GEN-32463 General Pump
*Model YVB7K
*Trapped Pressure Unloader
*Inlet=3/8" MNPT
*Outlet=3/8" FNPT
*Bypass=3/8" FNPT
*Max. 3650 PSI
*Max. 8 GPM
*Max 195 F

(Old PWP # ADI-104)
$46.65

General Pump YU3678 Unloader Valve


GEN-32465 *Modified Pressure Unloader
*Inlet=3/8" FNPT
*Outlet=3/8" FNPT
*Bypass=3/8" FNPT
*Max Pressure=3650 PSI
*Max GPM=8 GPM

(Old PWP # ADI-105)
$111.95

Unloader Valve



More Info

GEN-32496 Generals Interpump #ZKHM series
*10.8 GPM flow rate
*3000 PSI maximum pressure
*3/8" F x 3/8" M or 1/4" F
*(2) 3/8" Female bypass
*Trapped pressure

(Old PWP # ADI-340)
$102.00

Unloader Valve



More Info

GEN-32497 Generals Interpump #ZKHM series
*without spring and knob
*10.8 GPM flow rate
*3000 PSI maximum pressure
*3/8" F x 3/8" M or 1/4" F
*(2) 3/8" Female bypass
*Trapped pressure
*w/EZ

(Old PWP # ADI-341)
$98.00

General Pump YVB9KMS2 Unloader Valve with Micro Switch



More Info

GEN-32483 *Trapped Pressure Unloader with Micro Switch
*Inlet=3/8" FNPT
*Outlet=3/8" FNPT
*Bypass=3/8" FNPT
*Max Pressure=3650 PSI
*Rated Pressure=3200 PSI
*Max GPM=8 GPM
*Max Temp=195 F
*Switch is waterproof!

(Old PWP # ADI-1439)
$111.95

Repair Kit


GEN-32484 *For General Unloader #YVB9KMS

(Old PWP # ADI-1440)
$36.00

YU21405 Unloader Valve



More Info

GEN-32485 General Pump
*Trapped Pressure Unloader
*Green Spring
*Max GPM = 21
*Max PSI = 4500
*Inlet=(2) 1/2" FNPT
*Outlet= 1/2" FNPT
*Bypass=(2) 1/2" FNPT
*Operating Temp = 140° F
*Max Temp = 195° F
*REPLACES General Pump # YU2140
*General Pump # YU21405 


(Old PWP # ADI-1454)
$106.95

Repair Kit


GEN-32486
*Unloader Repair Kit
*For NEW style General Pump Unloaders #YU21405 and #YU21235 ONLY
*General Pump # YUKIT215R 


(Old PWP # ADI-1455)
$21.50

YU2158 Unloader Valve



More Info

GEN-32487 General Pump
*Stainless Steel Trapped Pressure Unloader
*Inlet=(2) 1/2" FNPT
*Outlet=1/2" FNPT
*Bypass=(2) 1/2" FNPT
*Max Pressure=5800 PSI
*Max GPM=21 GPM
*Max Temp=200 F

(Old PWP # ADI-1458)
$596.95

Repair Kit


GEN-32488 *For General Pump Unloader #YU2158

(Old PWP # ADI-1459)
$17.00

General Pump YU5075KS Unloader Valve



More Info

GEN-32489 *Trapped Pressure Unloader
*Inlet=3/8" MNPT
*Outlet=3/8" FNPT
*Bypass=1/2" FNPT
*Max Pressure=5650 PSI
*Rated Pressure=5100 PSI
*Max GPM=10.5 GPM
*Max Temp=195 F
*SS internal components

(Old PWP # ADI-1460)
$144.95

General Pump YVB130KTTI21 Unloader Valve w/Knob & Chemical Injector



More Info

GEN-32491 *Trapped Pressure Unloader with Chemical Injector
*Inlet=1/4" MNPT
*Outlet=3/8" MNPT
*Bypass=3/8" FNPT
*Max Pressure=2600 PSI
*Rated Pressure=2300 PSI
*Max Temp=195 F
*Unloader for the General Pump TT Series 51

(Old PWP # ADI-1462)
$70.00

YU21235 Unloader Valve



More Info

GEN-32493 Unloader Valve
*Trapped Pressure Unloader
*Yellow Spring
*Max GPM = 21
*Max PSI = 2600
*Inlet=(2) 1/2" FNPT
*Outlet= 1/2" FNPT
*Bypass=(2) 1/2" FNPT
*Operating Temp = 140° F
*Max Temp = 195° F
*REPLACES PA #YU2121
*General Pump # YU21235


(Old PWP # ADI-1464)
$105.95

Repair Kit


GEN-32495 *For General Pump Unloader #YU831D

(Old PWP # ADI-1466)
$14.95


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