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Fluidmaster, Twyford Road, Rotherwas, Hereford, HR2 6JE, United Kingdom

T: +44 (0)1432 357331 F:+44 (0)1432 264014 W: www.fluidmasterUK.com E: salesuk@fluidmaster.com

LF00145 Rev.2 - 03/2017

•  Variable flushing volumes 

•  Facilitates internal overflow 

•  1½

"

 BSP outlet

Delchem Dualflush 

Siphon

A Fluidmaster Family Brand

ONLY THE BEST INSIDE

A Fluidmaster Family Brand

ONLY THE BEST INSIDE

A Fluidmaster Family Brand

ONLY THE BEST INSIDE

®

A Fluidmaster Family Brand

ONLY THE BEST INSIDE

A Fluidmaster Family Brand

ONLY THE BEST INSIDE

A Fluidmaster Family Brand

ONLY THE BEST INSIDE

A Fluidmaster Family Brand

ONLY THE BEST INSIDE

A Fluidmaster Family Brand

ONLY THE BEST INSIDE

A Fluidmaster Family Brand

ONLY THE BEST INSIDE

®

A Fluidmaster Family Brand

ONLY THE BEST INSIDE

A Fluidmaster Family Brand

ONLY THE BEST INSIDE

A Fluidmaster Family Brand

ONLY THE BEST INSIDE

STAGE 3

How the Dualflush operation for this siphon works:

 

The full flush volume is achieved by flushing the WC in the normal fashion of fully 

depressing the lever and immediately releasing once the flush has started.

The short flush volume is achieved by fully depressing the handle in the normal 

fashion and holding the handle in the down position until the flushing cycle has  

finished.

A Fluidmaster Family Brand

ONLY THE BEST INSIDE

A Fluidmaster Family Brand

ONLY THE BEST INSIDE

A Fluidmaster Family Brand

ONLY THE BEST INSIDE

®

A Fluidmaster Family Brand

ONLY THE BEST INSIDE

A Fluidmaster Family Brand

ONLY THE BEST INSIDE

A Fluidmaster Family Brand

ONLY THE BEST INSIDE

DUALFLUSH SIPHON

Dualflush Label

High Level Cisterns

:

 To appear on or near the lower 

edge of the front of the cistern 

Low Lever and Close Coupled Cisterns:

 To appear 

on the upper half of the front of the cistern shell.

If in the unlikely event that your filling valve fails to close, all Delchem siphons feature 

an internal overflow which will be able to cope with upto 35l/min of excess water.

As the water level rises so will the level of water within the siphon, until it reaches 

point ‘P’, the ‘spillover’ point. At this point the water within the syphon will cascade 

down the down-tube and into the pan preventing any further increase in the height of 

the water within the cistern.

When choosing a Delchem siphon please make sure the bottom of the coloured cap 

(the ‘spillover’ point, point ‘P’ on the previous diagram) is lower than any existing exit 

point within the cistern, i.e. lever handle / side lever / side inlet internal overflow and 

cistern rim.

Internal Overflow

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