When you spend over £125* (Read More).
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Delivery Time 3 to 5 Working Days
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When you spend over £125* (Read More).
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£24.62 Inc VAT
Nationwide Delivery
Delivery Time: 3 to 5 Working Days
The hotun SF range of products, combines a tundish and dry-trap to provide a safe and visible discharge from a relief valve direct to a local waste or soil pipe, allowing a flow of water from the discharging T/PRV, whilst eliminating the risk of foul odours from the foul system entering back into the building AND providing regulation required, back-flow contamination & back-siphonage protection to prevent contamination of any wholesome water when connecting to the waste pipe (Category 5 risk water)
In a relief valve discharge application, due to the infrequent nature of the relief valve operating, a wet trap would dry out in time and thereafter allow foul odours back into the building, so is therefore not allowed to be used for PRV discharges.
The hotun 100C dry trap tundish was invented and patented back in 2014/15. It was the very first and original, dry trap tundish to be available specifically for boiler and unvented water heater installations as a one product solution and was the very first dry trap tundish to be accepted for use with many of Britains major and most respected boiler manufacturers, such as Worcester Bosch, Vaillant, Glowworm, Ideal, Baxi, Potterton, Ariston, Intergas etc.
The Speefit range of the hotun tundish now allows a quick and easy way to fit the tundish on the pipe using the well know and trusted John Guest brand of fittings. The collet insert allows for the tundish to be fitted to the D1 pipework in a matter of seconds
All hotun dry trap tundishes are specifically designed to achieve full compliance (when installed in accordance with our installation instructions) with Water and Building Regulations.
Please note that, where required, the D2 and connecting soil pipe must be suitably rated for the appropriate temperatures and flow rates expected when the Temperature Relief Valve (TRV) is operating under failure conditions.
hotun SF is WRAS approved – WRAS Approval Number: 1809329
Inlet pipe size: 15mm (or 1/2″ for imperial applications)
Inlet connection: 15mm Compression nut and olive (supplied)
Outlet pipe size: 22mm Copper or 21.5mm plastic
Outlet connection: 22mm Compression nut and olive (supplied)
Rated flow rate: 16LPM
Max flow rate: 22LPM (with optimised pipework – 200mm straight pipe before tundish see optimised diagrams below)
Usual applications:
NB
1. All D2 downstream pipework and soil pipes for unvented hot water heaters (with Combined T/PRV’s) must be suitably rated for water discharging at 90-95°C.
2. Appliances with PRV’s only (ie boilers and water heaters of less than 15L capacity) do not need a D2 waste pipe temperature requirement
*For orders below £125 ex VAT or any order for delivery to a remote location (Scotland etc) then delivery costs are calculated during checkout based on what you’re looking to order and the delivery address. Product exclusions apply to Storm products.
Enter your postcode at the checkout to see what options are available.
If you live outside of the UK Mainland, we’re sorry, but we can’t deliver to you.
Access Chambers are installed close to a house, usually on a path or patio near to the top of the drain so they ONLY have the option of a light-duty lid for pedestrian areas such as patios and paths (A15 Rating).
Only a 450mm Inspection Chamber should be used on a driveway or high foot traffic area, and the appropriately rated lid must be used to comply with The Building Regulations.
Inspection Chambers are a very important part of an underground drainage system, they provide access for testing and inspecting, as well as clearing blockages.
There are different types of inspection chambers, each with its own intended use and placement, depending on circumstances such as location, depth and foot or vehicle traffic. We’ve created a quick guide below:
Access Chambers, often referred to as mini or shallow access are used close to a house, and near to the top of the drain, so they’re not fitted deeper than 600mm (0.6m) and have a diameter of 300mm. They provide easy access for inspection and equipment.
*Access Chambers ONLY have the option of a light-duty lid for pedestrian areas such as patios and paths (A15 Rating).
Inspection Chambers are a larger version of an access chamber, usually with a diameter of 450mm to 600mm, enabling them to be installed further away from a house, and to a maximum depth of 1200mm (1.2m). They tend to also have more branches feeding into them.
Inspection Chambers a more versatile so have a choice of compatible lids rated for different applications, for example, driveways etc.
Manholes are larger than access and inspection chambers as they’re designed to be big enough for maintenance staff and equipment to enter the drainage system, they’re usually deeper than 1 metre and wider than 600mm x 900mm and lead to the sewer. They’re kept sealed and not accessible to the public.
Mini Access Chambers can be used effectively to a maximum depth of 600mm (0.6m), this is simply due to their narrow width. However, as they’re supposed to be installed near the house, they’re close to the top of the drain.
Due to them being wide enough for a child to fall down, Standard Inspection Chambers have a maximum permitted depth of 1200mm (1.2m).
*Using an inspection chamber deeper than 1200mm: In the rare instance that a deeper inspection chamber is required, then a 350mm Chamber Reduction Ring must be used, under these circumstances the maximum depth would be 3000mm (3m).
Delivery is usually within 5 working days, and you’ll receive more accurate estimates and updates via email, once we’ve processed your order.
 | Small Items: £12.50 + VAT Orders containing only small items |
 | Long Items: £22.00 + VAT Orders containing long items (pipe, guttering etc) |
| STORM Products: £50.00 + VAT Orders containing hygienic cladding and bathroom panels |
We charge a single delivery fee that is calculated and displayed in the basket, this is based on what you’re looking to purchase. For example, an order containing anything with a length to it, such as drainage pipe and guttering will cost more to deliver than an order that only contains small fittings. This is because most couriers only accept small parcels and the few that do take long items charge a premium for this service.
Delivery costs are based on product availability and delivery within the UK Mainland. Delivery to the Scottish Highlands and Islands may incur additional costs, if applicable, these will be given in the checkout after a delivery postcode is entered.
Get Free Delivery when you spend over £125 ex vat*
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