Boss
Boss Tundish 3/4 X 1
Boss tundish with 3/4 x 1 connections for unvented cylinder discharge pipework.
£29.05
£24.21 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Boss Tundish 3/4 X 1 is a discharge tundish for unvented hot water cylinder installations. It provides a visible air break in the discharge pipework from cylinder temperature and pressure relief valves. The size designation 3/4 x 1 is taken from the product name.
Signs this part needs replacing
- Cracks, splits or a detached body on the tundish
- Water escaping from the tundish rather than passing through it
- Scale, sediment or debris visible inside the tundish restricting flow
- Weeping or staining at the tundish connections
Before you order
- Confirm the discharge pipe connection sizes match the 3/4 x 1 designation in the product name.
- Check the cylinder make and model against the fits list.
- Inspect the discharge pipework for blockages, as restricted flow often causes water to escape from the tundish rather than the tundish itself being at fault.
- Check there is space to reinstate the visible air gap in the discharge run when fitting the replacement.
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BOSS 400 Litre Direct | — | — | — | |
| BOSS 400 Litre Indirect Solar | — | — | — | |
| BOSS 500 Litre Indirect Solar | — | — | — | |
| BOSS 570 Litre Direct | — | — | — | |
| BOSS 570 Litre Indirect Solar | — | — | — | |
| FLAMCO Supastor | — | — | — | |
| HEATRAE SADIA Megaflo (Internal Expansion) | — | — | — | |
| HEATRAE SADIA Megaflo Eco Plus Direct Models 1000 Litre | — | — | — | |
| HEATRAE SADIA Megaflo Eco Plus Direct Models 250 Litre | — | — | — | |
| HEATRAE SADIA Megaflo Eco Plus Direct Models 300 Litre | — | — | — |
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Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
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