Best Water Tanks for Pressure Washing Trailers
- 4 days ago
- 3 min read
A Pressure Washing Contractor depends on a reliable water tank to maintain steady water flow during trailer‑based operations. Whether cleaning commercial buildings, parking lots, or remote locations without water access, the right tank supports efficiency, safety, and uninterrupted workflow. Below are some of the best water tank options on Amazon that work well for pressure washing trailers and mobile washing rigs.

This 40 gallon water tank helps contractors transport clean water for mobile washing. The translucent poly material helps users monitor water levels quickly which supports better planning on job sites. Its six inch cap and two inch drain help improve filling and emptying efficiency for daily use. The molded garden hose port helps integrate easily into trailer plumbing setups. The chemical resistant build supports long term durability in exterior environments.
This 26 gallon polyethylene tank is designed for water and other non‑flammable liquids which helps it integrate well into smaller pressure washing trailer builds. Its corrosion resistant and UV stabilized construction helps maintain performance during long term outdoor exposure. The domed design helps improve tank strength while minimizing slosh during transport. This compact option fits easily into enclosed or open trailer frames.
This 50 gallon horizontal tank helps contractors store mid‑sized water volumes suited for residential cleaning routes. Its UV stabilized polyethylene build supports rugged outdoor use which helps maintain structural integrity in trailer setups. The large fill cap helps speed up refilling while the molded bulkhead fittings help simplify hose integration. This size works well for smaller dual machine setups or extended single machine workdays.
This 40 gallon Ameri‑Kart tank helps contractors add a larger onboard water supply to pressure washing trailer setups. Its BPA‑free polyethylene design supports clean, potable water storage which helps maintain pump performance and avoid sediment buildup inside high GPM pressure washer systems. The rectangular cube shape helps mount securely inside trailer frames while helping reduce slosh movement during transport. Multiple built‑in threaded fittings support flexible plumbing layouts for feed lines, vents, and drains which helps contractors configure custom rig systems efficiently. Its impact‑resistant and weather‑resistant build helps support long‑term durability on mobile washing routes.
This skid system integrates a 200 gallon tank with a pressure washer platform which helps contractors build complete trailer rigs quickly. The polyethylene tank supports outdoor use while the high capacity design helps sustain long multi‑hour cleaning sessions. This skid can mount inside trailers or flatbeds which helps expand versatility for mobile washing operations.
Why Water Tanks Matter for Trailer Pressure Washing
Water tanks help contractors:
Operate independently from job site water sources
Maintain consistent water flow for high GPM machines
Reduce downtime from constant refilling
Extend service areas into remote or rural locations
Improve professionalism and reliability during commercial work
A dependable water tank is essential for maximizing productivity and meeting customer expectations on mobile jobs.
Protect Your Pressure Washing Trailer Setup
Trailer rigs include water tanks, pressure washers, hoses, reels, chemicals, and high value equipment. Insurance helps protect against unexpected losses and liability issues.
Pressure Washing Contractor Insurance can include:
General liability
Workers compensation
Tools and equipment
Commercial auto
Stay protected while delivering high quality cleaning and maintenance services.
👉 Click here to get a fast no obligation quote from Wexford Insurance.






