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Decent.
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Prices may varyThis product ranks #12 of 14 in Foam Cannon.Three above it ↓
Last reviewed June 11, 2026
TL;DR At 2.0+ GPM the EQP321 produces moderate foam that clings 30·60 seconds on vertical panels per owner reports; bottle-thread failure is documented by multiple owners despite the TORQ Threadlock fix.
Polypropylene-body foam cannon with a brass quick-connect for any standard 1/4" pressure washer lance. At 2.0+ GPM, community-confirmed output is moderate · reasonable pre-soak cling, thinner than top-tier stainless-body cannons at the same flow rate. Ratio knob makes a perceptible difference across its range; fan pattern adjusts between narrow and wide. The TORQ Threadlock sleeve is marketed as a fix for bottle-thread failure; multiple owners report the problem persists regardless.
Good fit for home detailers at 1,500·3,500 PSI and 1.5+ GPM wanting a foam pre-soak step. Skip if your washer is below 1.4 GPM · a foam gun is the correct tool at that flow rate. Note: listed as an Amazon Add-On Item · requires a qualifying cart total to purchase on its own.
Hardware with no chemical exposure pathway · health score 9.5 (Minimal Risk). Polypropylene body is #5 recyclable; brass fitting is scrap-recyclable.
The EQP321 works with gas or electric pressure washers rated 500·3,500 PSI. Chemical Guys specifies a minimum of 1.4 GPM water flow, with 2.0 GPM recommended for best foam output. At lower GPM machines (below 1.5 GPM) foam output will be thinner.
It uses a universal quick-release fitting that connects to most standard 1/4" quick-connect pressure washer lances. It is not an M22 threaded connector · check that your pressure washer lance uses a standard 1/4" quick-connect before ordering.
The brass ratio knob on the side of the cannon head adjusts the dilution. Turning it clockwise increases soap concentration; counterclockwise reduces it. Most users find the midpoint to upper-third of the range works well with snow foam soaps.
Yes · the cannon works with any foam cannon-compatible car wash shampoo and is not limited to Chemical Guys soaps. Soaps formulated specifically for foam cannons (low-dilution, high-sudsing) produce the thickest output.
The most common cause is a clogged pickup tube or jet orifice from soap residue buildup. Disassemble the cannon and flush the uptake hose and orifice with warm water. Running clean water through the cannon for 30·60 seconds after each use prevents most clogging.
Marketing copy from Chemical Guys, via Amazon. Not editorial.
Guide
Best Detailing Kit Under $100, $200, and $500 (2026)
The $100 kit washes, dresses, and protects a daily driver for the year. The $200 kit adds foam, decontamination, and a real protection layer. The $500 kit is the first tier where paint correction and ceramic enter the chat.
Guide
Car Wash Methods, Explained: Every Way to Wash a Car
Every wash method is one answer to the same question: how do you lift grit off the paint without dragging it across the clear coat. Match the method to your dirt level and water access, and when in doubt, pre-rinse.
Guide
Foam Cannon vs Pressure Washer vs Pump Sprayer (2026)
Foam cannons need a pressure washer, roughly 500 to 1,100 PSI depending on the cannon, plus about 1.4 GPM of flow, and the flow matters as much as the pressure for dense foam. A pump sprayer like the iK Foam Pro 2 works with no hose at all, which makes it the only path for apartments and condos without outdoor water access. Cling time on the panel matters more than foam height.
Guide
How Often to Actually Wash Your Car (by Climate)
Every two weeks is wrong for most people. Salt-belt cars need a full wash plus undercarriage rinse every 7 to 14 days through the salt season. Coastal cars run 2 to 3 weeks year-round. Desert cars stretch to 3 to 4 weeks but need waterless or rinseless methods in between.
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