This Unloader Valve / Spill Valve Assembly is for pressure washers. Spill valve opens when water flowing through the pump gets too hot, releasing the hot water in exchange for cooler water.

Karcher Original Part / Spill Valve / Unloader Valve / Pressure Reliefe Valve - 4.591-040.0Replaces 4.591-036.0 (4591036)

• Commonly used on the following Karcher models:G 2000 MK • G 2000 QT • G 1800 LB • G 2300 IB • G 2401 OH • G 2500 LH • G 2500 OH • G 2500 LH • G 2500 HT • G 2500 PH • G 2500 VH • G 2600 OH • G 2600 OR • G 2600 PH • G 2600 VH • G 2650 HH • G 2650 OH • G 3000 BH • K 2200G/K 1800G • K 2301 * • K 2400 HH • K 3000 G *CDN • K 4000 G • K 4400 G • G2000MK • G2000QT • G2401OH • G2500LH • G2500OH • G2500PH • G2500VH • G2600OH • G2600OR • G2600PH • G2600VH • G2650HH • G2650OH • G3000BH • K2200G/K1800G • K2301 • K2400HH • K3000G • K4000G • K4400G
  
  

  G 2000 ET (1.133-620.0)	G2600VHv1, v2, v4 1.194-404.0, 1194-4040, 11944040;
  G 2000 MK (1.133-621.0)	G2650OH 1.194-508.0, 1194-5080, 11945080;
  G 2000 QT (1.133-601.0)	G2650OH 1.194-513.0, 1194-5130, 11945130;
  G 2300 LB (1.133-214.0)	HD 2.3/26 CV (1.107-077.0)
  G 2301 LT (1.133-213.0)	HD 2.5/24 P (1.575-105.0)
  G 2401 OH (1.194-505.0)	HD 2.6/26 P (1.575-106.0)
  G 2401HH (1.194-305.0)	HD 5/14 B *JP (1.194-702.0)
  G 2500 HT (1.194-307.0)	HD 830 B (1.187-103.0)
  G 2500 LH (1.194-403.0)	HD 830 B *EU (1.187-108.0)
  G 2500 OH (1.194-512.0)	HD 830 BS (1.187-121.0)
  G 2500 PH (1.194-401.0)	HD 830 BS *EU (1.187-113.0)
  G 2500 VH (1.194-402.0)	HD2.3/26CV 1.107-077.0, 1107-0770, 11070770;
  G 2600 OH (1.194-500.0)	K 1800 G (1.133-114.0)
  G 2600 OR (1.194-506.0)	K 1800 G * CDN (1.133-209.0)
  G 2600 PH (1.194-405.0)	K 1800 IB (1.133-121.0)
  G 2600 VH (1.194-404.0)	K 1800IB OHNE ZUBE. (2.640-198.0)
  G 2650 HH (1.194-508.0)	K 2200 G (1.133-115.0)
  G 2650 OH (1.194-513.0)	K 2200 IB (1.133-211.0)
  G 3000 BH (1.194-601.0)	K 2200 MTD (1.133-120.0)
  G 4.10 M (1.133-622.0)	K 2300 G (1.194-110.0)
  G 7.10 M *EU (1.194-701.0)	K 2400 HH *CA (1.194-304.0)
  G 9.60 *EU (1.133-700.0)	K 2400 HH-Q/C (1.194-301.0)
  G 9.85 *EU (1.194-700.0)	K 4000 G (1.133-201.0)
  G1800LB 1.133-124.0, 1133-1240, 11331240;	K 5000 G (1.133-109.0)
  G2000ET 1.133-620.0, 1133-6200, 11336200;	K 6000 GH *CA (1.194-109.0)
  G2000MK 1.133-621.0, 1133-6210, 11336210;	K1800AB 1.133-122.0, 1133-1220, 11331220;
  G2000QT 1.133-601.0, 1133-6010, 11336010;	K1800G 1.133-114.0, 1133-1140, 11331140;
  G2200MTD 1.133-120.0, 1133-1200, 11331200;	K1800Gca 1.133-209.0, 1133-2090, 11332090;
  G2300IB 1.133-214.0, 1133-2140, 11332140;	K1800IB 1.133-121.0, 1133-1210, 11331210;
  G2301LT 1.133-213.0, 1133-2130, 11332130;	K2200G 1.133-115.0, 1133-1150, 11331150;
  G2400HH 1.194-301.0, 1194-3010, 11943010;	K2200IB 1.133-211.0, 1133-2110, 11332110;
  G2401OH 1.194-505.0, 1194-5050, 11945050;	K2300G 1.194-110.0, 1194-1100, 11941100;
  G2500HT 1.194-307.0, 1194-3070, 11943070;	K2301LT 1.133-213.0, 1133-2130, 11332130;
  G2500LHv1, v2, v4 1.194-403.0, 1194-4030, 11944030;	K2400HB 1.194-303.0, 1194-3030, 11943030;
  G2500OH 1.194-512.0, 1194-5120, 11945120;	K2400HH 1.194-301.0, 1194-3010, 11943010;
  G2500PHv1, v2, v4 1.194-401.0, 1194-4010, 11944010;	K2400HHca 1.194-304.0, 1194-3040, 11943040;
  G2500VHv1, v2, v4 1.194-402.0, 1194-4020, 11944020;	K2401HH 1.194-305.0, 1194-3050, 11943050;
  G2600OH 1.194-500.0, 1194-5000, 11945000;	K3000Gca 1.133-117.0, 1133-1170, 11331170;
  G2600OR 1.194-506.0, 1194-5060, 11945060;	K4000G 1.133-201.0, 1133-2010, 11332010;
  G2600PHv1, v2, v4 1.194-405.0, 1194-4050, 11944050;	K4400G 1.133-208.0, 1133-2080, 11332080;
  	K5000G 1.133-109.0 1133-1090, 11331090;
  	K5100Gca
  	K5800GHca 1.194-106.0, 1194-1060, 11941060;
  	K6000GHca 1.194-109.0, 1194-1090, 11941090;