Specialty bags
Concrete Washout Bags for Site Wash Bays
Solids Settle Inside. The Water Drains. The Set Material Lifts Out Whole.
80 x 80 x 80 cm to 100 x 100 x 100 cm (typical) Woven PP body with a porous base panel Open top, reinforced, with a splash skirt
Applications
Where the Bag Is Set Up, and What It Catches.
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01
Ready-Mix & Site Wash Bays
Wagons, pumps and chutes washed out at a bay: the bag sits where the washout lands, so the material stops at the bag instead of reaching a surface drain or the ground beside it.
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02
Precast Yards & Piling Rigs
A washout point that produces the same mix every working day, sized from the volume one wash produces and emptied on the rhythm the yard already runs on.
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03
Washout Points That Move
On a site still being built the washout point moves with the works: the bag is lifted, set down and framed again where the next pour is, instead of a pit being dug and abandoned.
Structure
Where the Solids Stay and Where the Water Leaves.
The bag is a woven body with a porous base area and a reinforced open top, sized to sit under a washout chute or beside a wagon wash bay. Solids settle inside the bag while water drains through the base and side panels, so the material can be lifted out once it has set.
Unlike a dewatering bag, the load is not pumped in — it is discharged from a chute or a pump line at whatever rate the washout produces. The bag therefore has to take impact and splash at the top, and the base has to drain without blocking as the solids build up.
What the four numbers are
- Open top, reinforced, with a splash skirt — A skirt reduces splash on the surrounding ground.
- Reinforced flat base with a drainage panel — The base is the part that has to drain and then take the weight of set material.
- Four corner loops — Loops are sized for the set material, which is heavier than it looks.
- Used in a simple frame or with support sides — A frame keeps the bag open and upright during use; frame design stays with the site.
The frame is yours, the bag is oursA simple frame or a pair of support sides keeps the bag open and upright while it is filled, and that frame stays with the site. Send its dimensions with the enquiry and the bag is cut to sit in it, rather than the site bending a frame to fit a stock bag.
Sizes, Fabric and What the Bag Carries.
- Size
- 80 x 80 x 80 cm to 100 x 100 x 100 cm (typical) Size is set from the volume of washout one wash produces and how often the bag is emptied.
- Fabric
- Woven PP body with a porous base panel The base panel is selected for drainage without letting solids through.
- Top
- Open top, reinforced, with a splash skirt A skirt reduces splash on the surrounding ground.
- Base
- Reinforced flat base with a drainage panel The base is the part that has to drain and then take the weight of set material.
- Lifting
- Four corner loops Loops are sized for the set material, which is heavier than it looks.
- Support frame
- Used in a simple frame or with support sides A frame keeps the bag open and upright during use; frame design stays with the site.
- Packing
- Baled No printing is normally required.
What one bag takes
Typical bag sizes hold one to several cubic metres of washout per fill, drained over hours to days depending on the mix and the weather. Capacity figures are confirmed against the volume your washout produces per wash, not quoted as a fixed throughput.
What the bag does not do
The bag drains, so the water that leaves it still has to be managed: washout water is alkaline and its discharge is regulated locally, and that responsibility stays with the site. The bag is not a treatment system and does not neutralise anything.
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Right answer when
Ready-mix and site concrete washout points, precast yards and piling sites that need to intercept washout without building a pit.
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Not the answer when
The site's permit requires a lined or bunded washout facility, the washout volume is large enough to need a settlement tank, or the water has to be treated before discharge.
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Confirm before ordering
Volume of washout per wash, how the water is handled after draining, whether a support frame is used, lifting equipment, and local discharge rules.
Use & removal
From Setting It Out to Lifting It Away.
What happens between the bag arriving folded and the set material leaving site, in the order it happens.
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Set the bag out and open it
Place it under the chute or beside the wash bay, in its frame or between support sides, and open the mouth fully so the top stays wide while it is filled.
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Discharge the washout into it
Wash the chute, wagon or pump line out into the bag as usual. The reinforced top takes the impact and the splash skirt keeps the material off the ground around it.
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Let the solids settle and the water drain
Solids settle to the base while the water leaves through the drainage panel — over hours to days, depending on the mix and the weather.
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Swap in a spare while it drains
Empty bags store flat, so several are held on site ready: the next wash goes into a fresh bag while the first one drains in place.
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Lift the set material out and take it away
Once it has drained and set, the contents are lifted on the four corner loops as one mass and taken for disposal, instead of being dug out of a pit.
OEM & bulk supply
Made to Your Order, Packed for Your Channel.
A washout bag is assembled to the washout point rather than picked off a list, so most of what is called customisation is settled in the drawing. Packing, branding and repeat supply are agreed with the quotation.
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Customisation
Decided in the drawing, not from a list.
- Size from the volume one wash produces and how often the bag is emptied
- Base drainage panel selected to drain without passing solids
- Reinforced open top with a splash skirt
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Customisation
Baled for the site, marked only where it is needed.
- Bags are packed baled
- Printing is not normally required on a washout bag; where a mark is wanted it is quoted with the order
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Customisation
Sent as a schedule, not one bag at a time.
- Several bags per site, so a spare is flat and ready when one is full
- Repeat orders run to the drawing already approved
- Quantities and delivery agreed with the quotation
What we need with the orderThe washout volume per wash, how it is discharged, where the drained water goes, the lifting method and the frame — the same five answers the quotation is built from. Artwork, packing marks and delivery addresses follow once the size is agreed.
Evidence
What We Can Put in Writing.
In-house checks cover fabric weight, base drainage panel attachment, loop stitch counts and dimensions. Third-party testing is arranged on request and quoted separately.
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Inspection record Production
Batch sheet recording base drainage panel attachment and loop stitch counts.
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Drawing Approval
Dimension drawing for the washout point layout issued before production.
What is not documentedDrawings and batch inspection records can be shared on request. Washout handling and discharge arrangements are the customer's responsibility and are not documented by us.
Purchasing FAQ
What Buyers Ask Before the Order.
Size comes from the volume one wash produces and how often the bag is emptied, not from the size of the bay. Typical sizes run from 80 x 80 x 80 cm to 100 x 100 x 100 cm, and the figure is confirmed against your washout volume before anything is cut.
Through the drainage panel in the base and out through the side panels, as the bag fills. The water that leaves is still washout water — alkaline, and regulated where your site is — so how it is captured or discharged afterwards stays with the site.
No. It removes the solids and stops the material spreading while it drains. It does not neutralise anything, and it is not offered as a discharge approval or a permit in itself.
On four corner loops, sized for the set material, which is heavier than the volume suggests. Tell us the lifting method — crane or a forklift jib — so the loops and the stitching are matched to it.
A simple frame or a pair of support sides keeps the bag open and upright while it is filled. That frame stays with the site; send its dimensions and the bag is cut to sit in the one you already have.
The volume of washout per wash, how it is discharged into the bag, how the drained water is handled, the lifting method for the filled bag, and whether a support frame is used. A photograph of the washout point is enough to start.
Next step
Request a quote
A fabric bag placed where concrete wagons are washed out, so solids settle and the water can be handled separately. It keeps washout out of drains and site ground; the water rules remain the site's.
To price a bag we ask for
- Volume of washout per wash
- How the washout is discharged into the bag
- How the drained water is handled
- Lifting method for the filled bag
- Whether a support frame is used