Replace your Broken Wirquin Derwent Macdee Metro Round Cistern Siphon
NOTE: Ensure you choose the correct shape and size - see last photograph and information below
PRODUCT FEATURES
- Metro three piece siphon with quick release coupling nut for easy maintenance without having to remove the cistern
- Metro Rapid ROUND DSY7638
- 10.5" (see below for all available Round size options and how to measure).
- WRAS Approved
- Internal overflow
- Supplied with siphon back nut, flush pipe coupling nut, siphon seal and low level flush pipe seal and diaphragm
- For internal overflow measure from base of cistern to waterline and add 1", ensure that this measurement is a minimum of 10mm below any aperture in the cistern
- Ensure you are ordering correct syphon model. Others that look similar are Metro single flush range and Metro dual flush range.
- These products are now supplied Grey/Black in colour often replacing previous versions that were white/white & blue or grey.
DETAILS
- If you are unsure what size you require please contact us.
- This syphon comes in various sizes and various shapes (round / oblong / square / D-shaped), ensure you choose the correct size and shape for your cistern as per guidance below
- Do not get this syphon confused with the one piece Wirquin syphons.
SPARES: BE PREPARED - The diaphragm in this siphon will perish over time and diminish the flushing mechanism. Consider purchasing a spare diaphragm so you have it at hand when needed. The link is here.
INSTRUCTIONS: Instructions for the syphon can be found here.
CHOOSING THE CORRECT SIZE AND SHAPED MACDEE METRO RAPID SYPHON
There are 5 sizes in the Macdee Metro Rapid Range shaped Round. You need to ensure you purchase the correct height otherwise you will not obtain optimal flush AND the syphon may not fit into your cistern (and stop the lid closing!).
There are 2 ways to identify which size syphon you need:
1. Installing a Macdee Metro Rapid for the first time or replacing a different syphon with a Macdee Metro Rapid: To find the correct height of the required syphon for your cistern, measure from the bottom of the cistern to the waterline and add 25mm, ensuring that this measurement is a minimum of 10mm below any aperture in the cistern to decide what height siphon is required for the installation.
2. If you have an existing Macdee Metro Rapid and are confident you have the correct size syphon for your cistern then you can just measure the syphon to enable you to choose the correct syphon: See the last photo on this listing which shows where the measure. Basically take the measurement from the bottom of the bell part/bottom of the syphon to just under the domed top part. That is the syphon size you then need to purchase. See table below for sizes for Round Bell Shape:
|
HEIGHT cm |
SYPHON HEIGHT TO PURCHASE | C LINK SIZE | SKU (click on the SKU below to take you to the listing for that sized syphon) |
|---|---|---|---|
| 19.2 | 7.5" | 2.25" | FTB406 click here |
| 20.32 | 8" | 2.25" | FTB407 click here |
| 21.59 | 8.5" | 2.75" | FTB408 click here |
| 22.86 | 9" | 2.25" | FTB409 click here |
| 24.13 | 9.5" | 2.25" | FTB410 click here |
| 25.40 | 10" | 2.25" | FTB411 click here |
| 26.67 | 10.5" | 2.25" | FTB412 (this listing) |
VIDEOS / TECHNICAL DOCUMENT LINKS:
- Macdee Metro Rapid Information Sheet can be found here
QUESTIONS & ANSWERS:
Q1: How does the internal overflow on a toilet syphon work?
A1: A syphon will internally overflow when the water level within the cistern reaches the spillover point. The water will trickle over the spillover point, and run down the downleg of the syphon, and into the toilet bowl.
Q2: After replacing, why won't the syphon flush or flush only when I pump the handle?
A2: Check the quick release night is tightened.
A2: Check the syphon diaphragm washer is flat to the piston base and is not torn or damaged
A2: Check the Sealing Washer is not kinked or trapped