Concrete Washouts
A concrete washout gives crews a contained place to rinse concrete buckets, pumps, mixers, chutes and tools, so that slurry and wash water stay out of storm drains and the ground. The concrete bucket washout frame holds buckets of several sizes up to 528 gallons. Pump washout trays collect liquid waste under pumps and mixers and are handled by forklift, with fork pockets for moving the tray and a tipping design for emptying it. The range also covers steel washout pans, drain-through washout bags with their frames, and a closed-loop system that recycles the wash water.
Concrete washout containers, bags and systems
Steel washout pans
A steel concrete washout pan is the general-purpose washout for ready-mix chutes, mixers, wheelbarrows and hand tools, catching slurry and pump discharge in one open steel container until it is tipped out. It works as a temporary washout for a single pour or as a permanent wash point. Where the crew wants to draw off settled water before tipping the solids, the washout pan with a ball valve has the same body with a valve for controlled discharge.
Pump washout trays
A concrete pump washout tray goes under a pump hopper, mixer or truck to catch slurry and residue as the equipment is washed down. It drains through a ball valve and a Bauer-style outlet, so the contents can be run off to a hose before the tray is lifted. A tray is the right choice when the washout has to follow the pump from one setup to the next.
Concrete washout bags
Concrete washout bags are lined, drain-through polypropylene sacks that hold back cement, slurry and oil residues while the water passes out. They are the replacement bag for the bag frames, changed when full, and they are also used to drain flocculated settlement tanks and to catch residue from chute and tool washouts.
Washout bag frames
The washout bag and frame kit holds a washout bag in a rigid, reusable frame, so it can stand under a pump or wash point and drain in a controlled way. It suits pump and mixer washouts where the crew wants to empty the washout by changing a bag, without a suction truck or holding tank. The frame comes in single bag, double bag and enclosed versions.
Concrete bucket washout frame
The concrete bucket washout frame holds a crane-handled bucket steady over controlled drainage while it is washed out, and it adjusts itself to the bucket placed in it. General contractors, precast crews and equipment yards running concrete buckets of mixed sizes use it because one station takes the whole fleet. It is designed to work with the closed-loop system as part of a contained bucket wash station.
Closed-loop washout system
The closed-loop concrete washout system is a compact, self-contained unit that filters solids out of the slurry and recycles the water for the next wash. It suits sites without a permanent washout bay, where pumps, mixers and equipment are rinsed regularly and the crew wants the solids collected in a sack for disposal.

Sealed concrete washout bins or filtered systems
A sealed container is the right choice when the site has a forklift or crane close by and somewhere to tip the contents, and a drain-through or closed-loop unit is right when the water has to be separated on site so that only solids leave. Steel pans and pump trays keep everything that goes into them. The slurry stays in the steel body until it is tipped out, run off through the valve, or left to settle so the water evaporates and the solids harden, which keeps the equipment simple on busy pours where lifting equipment is always at hand.
Washout bags, the bag frames and the closed-loop system work the other way: the bag holds back cement, slurry and oil residues while the water drains through it. Bag frames suit sites with no vacuum truck access, or sites where a container full of liquid would be awkward to move, because what leaves the site is a bag of solids. The closed-loop unit suits sites with no discharge point, since it recycles its wash water for the next wash. Filtered water from a bag frame goes to the discharge point that the site's stormwater plan allows.
Concrete pump, truck and bucket washout stations
Concrete pump washout
At the end of a pour, the pump hopper, boom line and pipe are flushed out, and the washout under the hopper has to fit the clearance beneath it and catch everything that runs off. Catch area matters more than volume for this job. Pump washout trays and washout bag frames are both built for it. Fuel and hydraulic oil drips from the pump are a separate risk, handled with spill kits kept beside the washout.
Ready-mix chute and tool washout
Ready-mix drivers rinse their chutes after each discharge, so the washout needs a firm, graveled approach that a truck can back up to without crossing finished work. Hand tools, screeds and wheelbarrows are washed into the same unit. The number of trucks per pour sets how fast it fills, and a steel washout pan takes repeated chute washouts through a working day.
Concrete bucket cleaning stations
Crane-handled concrete buckets are washed after every pour, and the station has to hold the bucket steady while the crew works and contain everything that runs out of it. On precast and equipment yards the station stays in one place and handles the whole bucket fleet.
Settlement tank drainage
When wash water collects in a settlement tank and is treated with a flocculant, the settled solids still have to be separated from the water before either leaves the site. Draining the tank through a washout bag in its frame holds back the fines and oil residues while the water passes, and the full bag is lifted out and replaced with a new one.

Sizing and siting a concrete washout area
Pour volume and wash frequency
Size and the number of units follow from how much equipment is washed and how often. A pump washed down once at the end of the day is served by one tray or bag frame, while a site taking a steady run of ready-mix trucks fills a pan quickly and is better served by two in rotation, so one can settle while the other is in use. Where a bag frame faces higher wash volumes, the double bag frame carries two bags at one wash point.
Lifting and moving on site
Pans, trays and the closed-loop unit carry fork pockets, along with lift eyes or lifting points for a crane, so the handling equipment on site decides how easily a full unit can be moved and emptied. A full pan or tray is tipped out by forklift or crane, which means the site needs a machine able to lift it with its contents and a place to tip it. Solids tipped from a pan can go into self-dumping hoppers for removal.
Temporary or permanent wash stations
A wash station for one pour or a short phase can be a pan, tray or bag frame set down where it is needed and taken away afterward. A station that serves a whole project, or a yard for years, justifies the bucket washout frame or the closed-loop system, set up alongside the yard's other jobsite waste and spill equipment. In either case the washout goes close to the pour, well away from storm drains, ditches and open water, is marked on the site's stormwater pollution prevention plan (SWPPP), and is in place before the first concrete arrives. Large sites with spread-out pours are better served by several washouts than by one.
Rain and weather exposure
Rain adds volume to any open washout and takes up capacity meant for wash water. On sites without shelter, the enclosed version of the washout bag frame keeps rainfall out of the bag. Steel pans and trays placed in the open are best sited on ground where surface water does not run toward them.
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Frequently Asked Questions
Concrete wash water is highly alkaline and carries cement fines that harm fish and plant life, change soil chemistry and can reach groundwater if left to soak away. Construction stormwater permits treat washout as a pollution source and require it to be collected in a leak-proof washout.
Once the water has drained, evaporated or been recycled, the remaining solids harden and are broken out of the pan or tray, or removed in the full washout bag. Clean hardened concrete can go to a concrete recycler for crushing into aggregate. Solids in bags and any contaminated soil from the washout area leave the site with the project's construction waste.
A washout is checked daily during concrete work and after heavy rain, looking for leaks, damage to the container and how full it is. It is emptied well before it is full, so the next truck or pump washout cannot overflow it. Ahead of forecast storms, the level in an open pan or tray is lowered so rainfall does not carry slurry over the rim.
Yes. HERMEQ supplies steel washout pans, pump washout trays, washout bag frames, the concrete bucket washout frame and a closed-loop washout system to buy outright, with replacement washout bags as the consumable. The steel units are reusable from one project to the next, so a washout can stay on a long project or move between sites with the crew.
LEED credits are awarded to a project for its documented practices, so no single piece of equipment earns them. A washout that keeps slurry and oil out of drainage, recycles wash water and collects solids for recycling supports the pollution prevention and waste management parts of a project's plan. The closed-loop system and the washout bags are intended for projects working toward LEED credits and low-impact site operation.

























































