Macdee Metro D-Shaped Dual Flush Syphon | Sizes 7.5″–10.5″ | WRAS Approved

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Features & Benefits

• Genuine Macdee Metro syphons (codes DSD7125–DSD1638)
• WRAS approved for UK water regulations compliance
• Metro Rapid D-shaped bell housing — often used in Ideal Standard cisterns
• Adjustable flush volume selector (6/7/9 litres on oblong bell housing models)
• Three-part syphon with quick-release coupling nut for easy maintenance
• Supplied with siphon back nut, flush pipe coupling nut, siphon seal & low-level flush pipe seal
• Internal overflow: measure cistern base → waterline, then add 1″ (10 mm below aperture)
• Supplied in black (replaces older white/blue/grey versions — identical function; parts not interchangeable)

Compatibility Notes

• Designed for D-shaped cisterns (not round or rectangular).
• If your current unit has a 6/7/9L selector, choose the oblong bell housing variant.

How to Choose Your Size

1. Remove the cistern lid and measure the overall height from the base to the very top of your syphon.
2. Match your measurement to one of the sizes below, or pick by supplier code (e.g. DSD7125).

FAQs

Is this syphon WRAS approved?

Yes, Macdee Metro units are WRAS approved for UK water regulations compliance.

Will the black version replace older colours?

Yes. The black version supersedes white/blue/grey units with identical function, but parts are not cross-interchangeable.

How do I know if I need the oblong bell housing model?

If your existing syphon has a 6/7/9L flush selector, you likely need the oblong bell housing variant.

How do I measure my old syphon?

Measure the overall height (base to top) and match to 7.5″, 8″, 9″, 9.5″, 10″ or 10.5″.

What parts are supplied?

Siphon back nut, flush pipe coupling nut, siphon seal and low-level flush pipe seal.

Can I service it without removing the cistern?

Yes — it’s a three-part design with a quick-release coupling for easy maintenance.

Related: All toilet syphons · Macdee spares · Ideal Standard spares