Top hat 110mm Sewer EN1401
Top hat 110mm Sewer EN1401
Available to order
Code TH110F
Brand Cotterill Civils
- Diameter
- 110mm
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Total £11.55 ex VAT
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Alternative sizes
The same item in other sizes. Each opens its own page and price.
- 110mm EN1401This one
- 160mm EN1401£33.33 ex VATAvailable
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Overview
Top Hat 110mm Sewer EN1401
Top Hat pre-forms are designed to provide an effective and watertight seal around service pipe penetrations. This 110mm sewer top hat is suitable for use with EN1401 underground drainage systems, ensuring long-lasting protection against infiltration and exfiltration.
Manufactured from durable materials, it offers excellent resistance to ground movement and environmental conditions, making it ideal for a wide range of civil engineering, drainage, and sewer applications.
- Size: 110mm
- Standard: EN1401
- Application: Seals service pipe penetrations
- Provides: Watertight and secure connection
- Suitable for: Sewer and underground drainage systems
For technical advice or bulk pricing, call 0121 351 3230
More product information
With low permeability to hydrocarbon substances and vapours, and high puncture and tear resistance, these are ideal for making an effective gas-tight seal and preventing damp ingress for applications in which a 110mm pipe penetrates a membrane.
Top hats are ideal for use for when a pipe enters an attenuation tank and other applications where a 110mm pipe comes up against a perpendicular surface, and are suitable for use with jubilee clips or bonding tape.
Specification
| Product code | TH110F |
|---|---|
| Brand | Cotterill Civils |
| Colour | Black |
| Pipe size | 110mm |
Delivery and collection
- Delivered across Great Britain on our own vehicles or by courier, depending on the product.
- Delivery is charged per delivery, not per item, by zone.
- Collect from Cotterills Birmingham Depot, near Junction 9 of the M42: Hermitage Farm, Grove Lane, Wishaw, B76 9QJ.
- Northern Ireland, the islands, the Isle of Man and the Channel Islands are quoted separately.
Questions about soakaway crates
What is the difference between a soakaway and an attenuation tank?
A soakaway lets rainwater soak into the surrounding ground, so the crates are wrapped in geotextile that lets water through. An attenuation tank stores the water and releases it slowly to a sewer or watercourse through a flow control, so the crates are sealed in an impermeable membrane. The same crates can do either job; the wrap and the outlet make the difference.
Can soakaway crates go under a driveway?
Yes, if the crate is rated for it. The 40 tonne StormMaster and 62 tonne Hydrocell crates are for driveways, car parks and other trafficked areas. The 20 tonne AquaVoid Home crate is for gardens and landscaping with no vehicles. Whichever you use, follow the maker's data sheet for bedding, backfill and minimum cover, or the rating won't hold.
How many soakaway crates do I need?
Divide the storage volume from your drainage design by the volume of one crate. A 1m x 0.5m x 0.4m crate is 0.2 m³ and a 1m x 1m x 0.4m crate is 0.4 m³. So 2 m³ of storage needs about 10 small or 5 large crates. Check the void ratio on the data sheet, as usable storage is slightly less than the crate size.
Do soakaway crates need wrapping in geotextile?
Yes. For a soakaway, wrap the whole crate structure in non-woven geotextile. It lets water pass into the ground but stops soil and silt getting into the crates. Our 4.5m x 10m Don & Low handy pack suits small soakaways. For an attenuation tank, geotextile is normally used to protect the impermeable membrane, not instead of it.
How far from a house should a soakaway be?
Approved Document H of the Building Regulations says a soakaway should not be built within 5m of a building or road, or in unstable ground. Building control or your drainage designer may ask for more, for example on chalk or where the ground slopes towards the house. Check the distance with them before you dig.
How much is delivery?
Delivery is priced by zone and charged per delivery, not per item. Enter your postcode above to see the price for your site, or see our delivery zones page.
Can I collect my order?
Yes. You can collect from Cotterills Birmingham Depot, near Junction 9 of the M42 (Hermitage Farm, Grove Lane, Wishaw, B76 9QJ), Monday to Friday. Choose collection at checkout.
Can I open a trade account?
Yes. Groundworkers, contractors and merchants can apply for a credit account online. Apply for a trade account.
Can you price a whole job from drawings?
Yes. Send us your site drawings and we'll do a free take-off and quote the full drainage schedule, with no obligation. Send your drawings.
Still unsure? Call 0121 351 3230 and talk to the team.
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Got drawings? We'll price the whole job
Send your site drawings and we'll do a free take-off and quote the full drainage schedule, with no obligation.