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I have just fitted a Grohe cistern 38 691 but have not achieved a good flushing pressure - ie the water does empty out of the cistern on pushing the air button but seems to be so slow that there is no 'whirl' type effect in the toilet pan. Can you perhaps suggest what I may have done wrong? Thank you.

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 16 Answers

SOURCE: toilet cistern doesn't fill up

it sounds like one or more of your shut off valves has a glog from hard water calcium. were from indiana its a big problem here.To check this u will have to shut off main water supply and remove top of shut off valve and check for white crusty blockage, even if u see a few particals its present. It can severely restrict flow.

Posted on May 03, 2009

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miket756
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SOURCE: my main toilet and en suite toilet cisterns are

is this low water presher??? an air lock??? or just blocked up pipes? even sticky ball velves can do this? test for warer presher loss first

Posted on Oct 27, 2009

jharvey572
  • 447 Answers

SOURCE: Buttons on our concealed dual

the ring where the buttons are should unscrew and the full unit should pull out,if that dos,nt stop the water try to gently pull the plunger up, if that stops it push the plunger back in to flush toilet,see if plunger returns to normal position and water stops, if that dos,nt work have it checked out by aservce engineer.

Posted on Jul 09, 2011

  • 139 Answers

SOURCE: opal 2000 toilet suite, water leaking from around

check the donut seal which seals the cistern to the pan, they perish and leak when the toilet is flushed, water runs down back of pan to floor you can check this by drying/wiping with tissue back of pan and flushing you will see if any moisture is running down there by wiping again with tissue and seeing if it is damp.

Posted on Sep 06, 2011

  • 3 Answers

SOURCE: Weak dual flush does not empty the toilet bowl.

Waste pipe problems aside, if its a dual flush check you are actually working the full flush button and that the mechanism is working properly and not stuck operating only the half flush. If then you look in the tank both the total water level in the tank (white screw at the filling valve) and the quantity of water let go for each full and half flush (blue parts below, in the flush mechanism) can be set to different levels. Yours might be set to the minimum

Posted on Mar 13, 2012

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1 Answer

How do i adjust the toilet tank from over flowing


adjust the float setting or the setting on the unit around the inlet pipe
this is achieved by screwing up or down on the threaded section read the instructions as you may have to fit a pressure regulator before the cistern tap if utility pressure exceeds the desired operating pressure of the cistern

Nov 07, 2015 | Home

Tip

FIXING A TOILET THAT WILL NOT FLUSH!!! a simple but very effective money saving...


This simple how to, is based upon most lever operated toilets, with the cistern mounted above the toilet bowl. The make and model of toilet used for this feature is of the following:
Toilet and internal syphon
DUDLEY ELITEDudley S7 Cascade syphon
Problem:
My toilet will not flush, but the ball float valve is working and there is water in the cistern; no leaks present and the flushing lever is not broken or disconnected, what do I do?
Answer:
first isolate the water to the toilet or the main water supply to the house. Bail out the water from the cistern using a small jug or cup, (or you can syphon the water manually using a hosepipe or similar pipe, a towel to cover your mouth, and either a bucket or the toilet bowl) and remove water from the bottom of the cistern with a sponge.


Changing the syphon in a toilet that is not close coupled is far easier as you do not need to remove the cistern from the wall!


Undo the lower of the two large nuts beneath the cistern using a large pipe wrench or pair of water pump pliers, now disconnect the flush pipe and push it to one side.
Place a bucket or bowl beneath the cistern and undo the Nut which is immediately below the cistern (syphon replacing nut), some water may be released by the syphon, take note of any washers that are removed as new ones need fitting when replacing the siphon.
Unhook the lift rod from the flushing lever and remove the syphon.


Inside the toilet syphon, there will be a small plastic piece of sheet called a diaphragm; you can fabricate a replacement using the plastic title cover on a DVD case. Cut this to the exact same size and shape as the original part, and fit this to where the original diaphragm was. This is your new replacement.


Refitting is a complete reversal of removal, be sure to fit any washers (preferably new ones) that you have taken out. Ensure everything is tight but do not over tighten before refilling the cistern



on Aug 09, 2010 | Plumbing

1 Answer

Roca dual push button Toilet will only flush when holding the push button continuously down until the cistern is empty. It won't completely flush like it should when pressing the button once.


allow tank to fill a little more by adjusting fill valve. When there's not enough water flowing from tank the stopper can over-power the water flow and cause the flush to stop by re-sealing.

Feb 28, 2015 | Home

1 Answer

Grohe service


toilet will need syphon replacing. the lid should lift of the cistern, some have the push buttons screwed down to the syphon and to remove them just turn the ring around them anti-clockwise.

Aug 22, 2014 | Home

1 Answer

SL tank carrier unit just installed last week.work fine the first few times, now water keeps running into the toilet bowl


hey, since it is new, I assume a small stone or left-over is stuck where the seal is, You need to disassemble the valve, clean it and re assemble. Look at this guide that might help you. though it is not the exact model, principle is the same.
Have fun
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Grohe dual fush push button


hey,
If you can get a new bellows this is possible.Repairing a bellows is also possible if you have the skills and tools to hot-air solder it.
Look at this guide that might help you. though it is not the exact model, principle is the same.
Have fun
Avi

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How to connect plastic pipe


hello Bill, the other end is attached to the valve pneumatic unit.

Look at this guide that might help you. though it is not the exact model, principle is the same.
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Push button not operating fully/correctly. cistern flushes sometimes, but not always and is only two years old. It's a Grohe concealed cistern.


hey,
Check your button/s panel, check that the hoses are connected firmly.
Disconnect the hose and blow air through it, does it work now?
If it works ok, you need a new buttons panel. (or fix it).
If problem remains, you need to disassemble the pneumatic valve and check / clean/ repair it.
Look at this guide that might help you. though it is not the exact model, principle is the same.
Have fun
Avi

Grohe GD2 flush system concealed cistern repair fix and disassembly...

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