Thomas Dudley Ltd S7 Cascade Siphon 229mm (8121F)

£ 10.89INC VAT

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Thomas Dudley Ltd S7 Cascade Siphon 229mm (8121F)

1-piece cascade siphon. Convertible 6, 7 and 9Ltr adjustable flushing volumes. Compatible with most lever-operated cisterns. LL HL cone rings supplied.

  • Water Efficient
  • Manufactured in the UK
  • Single-Flush
  • Adjustable Flushing Volumes
  • Suitable for Low Level Use
  • Easy to Install
  • Internal Overflow
  • 5 Year Manufacturer's Guarantee

More Info

View all: Thomas Dudley Ltd Fill & Flush Valves

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Thomas Dudley Ltd S7 Cascade Siphon 229mm is rated 4.4 out of 5 by 41.
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Rated 5 out of 5 by from Good value Excellent value for money Easy to fit and simple design.
Date published: 2021-01-20
Rated 5 out of 5 by from Good value Good piece of kit, easy to fit and works well. Good value.
Date published: 2021-01-07
Rated 5 out of 5 by from Good siphon Easy to fit and set up. Bought to replace a 20yr+ one whose diaphragm had shredded itself and for which a replacement could not be found. This one is a powerful flusher, and took less than an hour of my diyer time to fit. Very happy with it.
Date published: 2021-01-03
Rated 5 out of 5 by from Flushed with Success When your bog is in bits Head to Screwfix! Excellent service at Melksham!
Date published: 2021-01-02
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will this be a suitable replacement for a Derwent Macdee 8.5" syphon

Asked by: ncpcs5

Flush lever & siphon return function

I've fitted this TD siphon and post flush it remains elevated. For the next flush we have to manually return the lever to the upper position / return siphon to its lower position - is this normal or is the siphon missing a return spring?
Asked by: Barton99

Can I replace 9.5 inches syphon with 9 inches syphon ? ( single flush)

I have got an old Armitage shanks free flow 9.5 inches Syphon, can I swap it to 9 inches Thomas Dudley s7 cascade
Asked by: Shilgit

Internal overflow

I have purchased this from Screwfix and on the list of features it said it had an internal overflow. I purposely overfilled the system but no internal overflow seemed to come into play. Was this advertised correctly?
Asked by: coal
Thank you for your enquiry, We would like to know some more information if possible. Could you tell me what type of cistern the Syphon was fitted into, or how this was tested ? The Internal overflow is designed to allow excess water, once it reaches the “ Spill Over Point of the Syphon “ to overflow into the down leg, and then into the Toilet Pan. ( Normally this is caused by a failure of the diaphragm washer of the inlet valve, allowing a small amount of water to gradually fill the cistern with water ) The internal Overflow is not designed to take a Full Bore failure of the inlet valve. i.e the Rapid filling of the cistern with water I trust that this helps, but if you need any more information, please give our team a call on 0121 530 7000 Kindest Regards Thomas Dudley Sales Team
Answered by: Dudley Sales TDL
Date published: 2020-06-21

I apper to have a 9 1/2" Cascade siphon. Will a 9" version be OK to fit?

Asked by: Snorch
Good Morning, you will need to check your water level in the cistern first, if you have an 8" waterline then a 9" syphon will be fine to fit into the cistern. It is important to keep a 1" gap from the water level and the internal overflow height. All our Syphon measurements are to the internal overflow height, not the overall height of the syphon. Kind Regards, The Sales Team
Answered by: Dudley Sales TDL
Date published: 2021-05-28
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Specification
Brand Thomas Dudley Ltd
Connection Type 1½" BSP Connection
Manufacturer Guarantee 5 Year Manufacturer's Guarantee (T&Cs Apply)
Pack Size 1
Pieces in Pack/Case 1
Product Height 290 mm
Product Length 229 mm
Product Type S7 Cascade Siphon
Toilet Fitting Type Fill & Flush Valves
Volume 6, 7, 9 Ltr

Product contents

Siphon, backnut, seal, coupling nut, washer, lever c-link, low level and high-level cone rings.