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tundish

The word tundish originates from a shallow wooden dish with an outlet channel, fitting into the bunghole of a tun or cask and forming a kind of funnel for filling it. These were originally used in brewing.
In general, any tundish will accept flow and store a small amount of material, while dispensing material elsewhere, similar to a funnel. In contrast to a funnel, the purpose is generally to regulate flow, and achieve a more steady output with intermittent inputs, and the tundish typically will take on a different shape.

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  1. M

    IPSWICH Heatrae megaflo (unvented) problem

    Heatrae sadia megaflo is showing a visible flow through the tundish. The water is stone cold through the tundish. Combination valve has already been replaced. Recharged cyl countless times. Cheers
  2. O

    PRV exits into a tundish T'd off condensate pipe! OK?

    Hi, I have had a full CH system installed in my bungalow Baxi Duo-tec Combi 28HE + 7 rads in a day and am concerned that some corners have been cut. The boiler sits in a cupboard in the centre of the bungalow. A ll pipework runs up to it from under the floor and to my mind is the high point in...
  3. A

    Overflow Pipe indoors

    Hi, I've recently purchased a new property and need to replace the hot water system. The property only has electric and for simplicity I'm thinking of fitting a vented, direct water cylinder. The overflow pipe on the current system comes through the bathroom wall and terminates just above the...
  4. P

    Unvented cylinder discharge pipe

    We recently had a 120 litre Gold unvented cylinder fitted in our first floor airing cupboard. The cylinder's pressure release valve D2 discharge pipe is plastic (originally fitted for the previous twenty year old BoilerMate) and looks about 22mm diameter. There is approx 100mm of vertical...
  5. P

    Drain off on unvented.

    Just changing an oil boiler on a job and they have just had a megaflow fitted. The installer has put a lever valve in, on the cold in with a tee connected to the discharge below the tundish as a drain off. Is it allowed?
  6. B

    Geberit urinal frame with 2 flush pipes question?

    The geberit duofix 111.622.00.1 frame. Anyone know the list of compatible urinals? What is the pipe interrupter? Also, why are there 2 flush pipes? Thanks ...... jazz drummers!:confused5:
  7. D

    Santon Unvented System - hot water to tundish

    Hello Everyone, This has been happening for time now, well, since i bought the flat which was back last month. When ever the cylinder is fired, after around 10mins of boiling, the tun dish frequently drops water in a flow not drops, then later stops. After which, there is no further hot...
  8. Best

    Tundish letting water out

    This has been puzzling me for ages & now today I have had a call about water coming through a ceiling. Went to it, not knowing anything about the fairly new house & found a Heatline unvented cylinder with water all over the floor below the tundish. Was actually the relief valve from the red...
  9. Z

    Tundish leaking on Tribune Premier when water heating up - help!

    Hello I have water leaking (dripping/pouring) when my boiler heats up my hot water. Over the past few weeks I have heard a popping noise as well - though not necessarily at the same time. I suspect it might have something to do with my expansion vessel. Can anyone help? Regards, Zoomer.
  10. M

    Tundish on unvented cylinder

    Hey is it usual for a tun-dish to splash alot of water out when testing the discharge of the pressure or temperature relief on full? There's no problem with the discharge pipe over 300mm before first bend after tun-dish and less than 9 meters in 22mm.
  11. G

    Boiler losing pressure and found a leak

    Hello, This is my first message here and I'd be grateful for any tips or pointers! A few months ago, my boiler pressure dropped to the point that it cut out until the filling loop was used to re-pressurise it. Someone else did this for me as this is my first home and I had no idea. I...
  12. G

    Dripping tundish after service

    We had our boiler serviced on friday. The whole system is only a year old. As part of the service the plumber drained and recharged our expansion tank with a foot pump. He did this because bi mentioned the pressure had been slowly dropping on the gauge. Since then the tundish has had a slow drip...
  13. D

    Unvented water boiler help needed with flowing tundish

    Hi all, I apologies in advance for what might become a long post, and for my inaccuracies in any naming terms, and lastly, for my complete lack of knowledge of anything plumbing related. Background: I live in a three story townhouse, and I have recently spotted a sizable water stain mark on my...
  14. J

    150L Ultrasteel Unvented Cylinder - Water dripping through

    I have a 9 year old Ultrasteel unvented cylinder 150L that has recently had a problem with dripping water through the tundish. I called a qualified unvented cylinder engineer who replaced the hot water temperature/pressure valve, then the cold water pressure valve & now the expansion...
  15. P

    Consistent Drip Through Tundish

    Hi all, I have a new build home (now just over a year old) the hot water system is an RM Cylinders Homeflow. Two weeks ago I noticed a dripping noise coming from my airing cupboard, upon investigation I found it was a consistent drip through the Tundish (I only discovered this was called a...
  16. T

    Unvented - Dishcharge into Tundish

    Gents, I have a Range Tribune HE Unvented system with a slow discharge into the tundish. I am G3 qualified however not much experience with external expansion vessels as all I have come accross so far have been Bubble top. I reset the TRV and the PRV but still a discharge. 3 options I can think...
  17. M

    Cold feed to unvented cylinder

    Hey I am currently studying for my level 3 at college and learning about unvented hot water systems. I have a question about the cold feed to these cylinders if anyone can help. I know it need a composition valve on it which contains an in-line strainer and pressure reducing valve. And a...
  18. R

    PRV Termination

    On a condensing boiler is there anything wrong with terminating the copper prv pipe into plastic soil pipe. Both Condensing pipe and PRV have been terminated at nearby soil pipe.
  19. W

    expansion valve discharge

    I have fitted an unvented solar cylinder and the posistion of the cold supply pipework is low level...ideal to connect straight into cylinder inlet. however this would obviously mean that i will not be able to tee the expansion discharge into the D1 above the tundish. Is it possible to fit a...
  20. L

    tundish problem

    Hi i'm trying to find out what the name and where to get a metal tundish like unit that fits onto the back of the toilet wooden panel for concealed cistern next to the back to wall toilet pan it has a small chrome veiw window. Thank for any help.
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