hotun SF range

hotun SF 

Product Overview

The hotun SF range of dry trap tundishes combines a tundish and dry-trap to provide a safe and visible discharge from a relief valve whilst eliminating the risk of foul odours from a waste or soil pipe entering back into the building.

The hotun SF range has been specifically designed to achieve full compliance with water and building regulations, the hotun sf range of dry trap tundishes allows a discharge from a relief valve to connect direct to a foul waste or soil pipe (allowing a flow of water one way, but also providing regulation required, back-flow contamination & back-siphonage protection to prevent cross-contamination of wholesome water & the waste pipe (Category 5 risk water)).

WRAS approved as an air break to drain and suitable for use across domestic and commercial systems, 

 

WRAS Approval Number: 1809329

WRAS approval documents
Specifications - Connections, Flow Rate, Applications

Inlet pipe size

 15mm

Inlet connection

 Inbuilt temperature compliant push-fit connection

Outlet pipe size

 22mm Cu or 21.5 plastic

Outlet connection

 Compression nut and olive (supplied)

Rated flow

 16LPM

Max flow rate

 22LPM (with optimised pipework configuration)

Usual applications 

  • Small (<15L capacity) water heaters
  • Boilers with PRV’s only (unless otherwise stated by a boiler manufacturers specification/instructions)
  • Overflows from storage water tanks
  • Air conditioning unit drip trays
  • MVHR condensation drip trays
Typical Installation Diagrams

Click on any image to enlarge in new page

Technical Drawings
Specifications - Connections, Flow Rate, Applications

Inlet pipe size

 15mm

Inlet connection

 Inbuilt temperature compliant push-fit connection

Outlet pipe size

 32mm

Outlet connection

 Suitable for 32mm push fit or universal mechanical fittings – see compatible connection diagrams below  –  (hotun hiflo SF outlet size is not compatible with solvent weld fittings)

Rated flow rate

 25LPM

Max flow rate

 45LPM (with optimised pipework configuration – see technical diagrams

Usual applications

  • Any/all unvented water heaters with combined T/PRV’s up to the rated flow rate.
  • Boilers
  • Overflows from water tanks
  • Airconditioning drip trays
  • MVHR condensation drip trays
Typical Installation Diagrams

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Compatible 1 1/4" Outlet Connections

The 1 1/4″ (32mm) outlet on the hiflo version is compatible with either universal compression or push-fit fittings.

Due to the material used in hotun plastic (acetyl) it will not successfully solvent weld, and due to its size, female solvent weld fittings will be too large for the male spigot.

It must also be noted that many solvent weld pipes are not of a sufficient grade (material) and are therefore not suitable to be used in unvented hot water heater D2 discharges when connected to a TEMPERATURE RELIEF VALVE discharge line*.

*NB – this note about the suitability of pipework materials is only relevant to applications that have a TEMPERATURE RELIEF VALVE operating at temperatures above 90°C over several cycles of flow.

For all applications that have a pressure relief valve only (eg boilers and small unvented water heaters) the issue of temperature and volume of water is not an issue and a much wider range of materials will be suitable for use.

If you are unsure of these requirements please feel free to contact our technical team on our contact us page and we will be able to fully discuss these issues with you.

Optimised flow pipework configuration example diagram

Click on image to enlarge in new page

 

Technical Drawings
Specifications - Connections, Flow Rate, Applications

To Be added

Typical Installation Diagrams

Click on image to enlarge in new page

Compatible 1 1/4" Outlet Connections

The 1 1/4″ (32mm) outlet on the hiflo version is compatible with either universal compression or push-fit fittings.

Due to the material used in hotun plastic (acetyl) it will not successfully solvent weld, and due to its size, female solvent weld fittings will be too large for the male spigot.

It must also be noted that many solvent weld pipes are not of a sufficient grade (material) and are therefore not suitable to be used in unvented hot water heater D2 discharges when connected to a TEMPERATURE RELIEF VALVE discharge line*.

*NB – this note about the suitability of pipework materials is only relevant to applications that have a TEMPERATURE RELIEF VALVE operating at temperatures above 90°C over several cycles of flow.

For all applications that have a pressure relief valve only (eg boilers and small unvented water heaters) the issue of temperature and volume of water is not an issue and a much wider range of materials will be suitable for use.

If you are unsure of these requirements please feel free to contact our technical team on our contact us page and we will be able to fully discuss these issues with you.

Optimised flow pipework configuration example diagram

To Be added – But similar to hotun hiflo SF above

Technical Drawings
Headline Information - Purpose

Purpose

To prevent deliberate or accidental contact with potentially scalding water dripping through the open tundish

Compatible with

hotun shield SF (HSSF) is only compatible with the “SF” ange of hotun tundishes, ie speedfit inlet. They are NOT compatible with our 100 range (threaded inlet) tundishes

Headline Information - When to use shield

hotun shield SF is designed to prevent the user from accidentally touching potentially scalding hot water.

It is therefore used on a risk assessment and job by job basis with the installer determining what the risk is (if any) and if there is a justification for fitting the shield with the additional safety that the shield brings

Compatible hotun SF tundish products

hotun shield SF (HSSF) is compatible with the “SF” range of hotun tundishes, ie push-fit inlet.

They are NOT compatible with our “100” (threaded inlet) range of tundishes

Get In Touch

Registered Address

RA Tech UK Ltd
6 Nottingham Road
Long Eaton, Nottingham, UK

T: 01332 702678
E: info@ratechuk.co.uk

 

HOTUN – THE SIMPLE SOLUTION

In one simple fitting, hotun solves the problem of compliantly running a PRV valve discharge from a pressurised hot water cylinder relief valve or boiler pressure relief valve to a local waste or soil pipe.

hotun combines a tundish and a non-return valve to make a dry trap tundish which acts as a visible early warning device and prevents foul odours from escaping from the waste/soil pipe.

 

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