Alston Pressure Water Spray Car Undercarriage Cleaner Washer Max 4000PSI Chassis Washer Surface Cleaner 1/4 Quick Connector with Wands for Car Ground Cleaning

Salt from a beach run and clay off a station track sit on the chassis rails where no sponge reaches, and lying on a wet driveway poking a wand upwards is a miserable way to get at it. This trolley rolls underneath on two wheels and fires the jet up into the underbody.

Undercarriage mode and surface mode

A pivoting coupler swings the spray head between two positions. Pointed up, it works as an undercarriage cleaner, dragging under the car so the jets strip road dirt, oil and fuel residue off the chassis. Pointed down, it becomes a flat surface cleaner for driveways, patios and decking, shifting sand, leaves and light mud without the striping you get from waving a lance by hand. Four stainless steel nozzles fire at 40 degrees, and the wheels hold a consistent standoff.

Runs off the washer you already own

This is an attachment, not a machine — no motor, no pump, and it does nothing until it is plugged into your own pressure washer. The supplier states an acceptable range of 1500 PSI to 4000 PSI and recommends 2500 PSI or higher, so a small entry-level unit will drive it but will not do much under a muddy 4WD. Connection is a 1/4-inch plug and quick connector.

Key features

• Two jobs, one head: the pivoting coupler converts it between undercarriage and surface cleaning.
• Wheeled chassis: rolls under the vehicle, so nothing has to be jacked or crawled under.
• Stainless steel nozzles: four of them, set at 40 degrees.
• Quick-connect fitting: 1/4-inch plug, on and off the wand without tools.

Specifications

• Working pressure: 1500–4000 PSI acceptable; 2500 PSI or higher recommended by the supplier
• Wheel/base dimension: 12 cm x 43 cm
• Straight tube: 41 cm
• Bend tube: 35 cm x 9 cm
• Nozzles: 40 degree, stainless steel
• Inlet fitting: 1/4-inch quick connector
• Maximum water temperature: 140° F, exactly as published by the supplier — no metric figure is given

What's in the box

• 1 x 2-functions-in-1 undercarriage cleaner head, listed by the supplier as 16 inch
• 2 x straight extension wands, 41 cm each (listed in the pack list as 16 inch)
• 1 x 90-degree curved wand — listed as 15 inch in the pack list but as 35 cm x 9 cm in the specifications; the two figures do not agree

Before you connect it

• Check what your pressure washer's outlet takes. Quick-connect fittings are not standardised across brands, and the supplier names no brand this unit is guaranteed to suit.
• Do not feed it above the stated 4000 PSI or above the stated maximum water temperature.
• Keep feet and hands clear of the nozzle path; the jet can injure at close range.

A sensible buy if you already run a pressure washer and the underbody collects something worth removing.