Speedfit Tank Connectors need a 36mm Holesaw - where from?

[realstokebloke]

Hi,

lots of great advice ref additional CW tank installation, thanks.

But, the 22mm tank connectors say they require a 36mm hole in the wall of the tank for the fitting.

I can find plenty of 35mm or 38mm but no 36mm.

Is it crucial, or is it a case of using a 35mm & 'helping' it in? (obviously, i want the hole to be as neat & clean as possible.)

What does anyone else use plse?

Also, is it just a 'normal' hole cutter - not a specific one for plastic tanks?

Also (ii) is there a preferred way to block unwanted holes in the tank? I have been told a new speedfit with a plug (by Speedfit obviously :wink: ) or, if there are compressions on there already, just fit some pipe in & solder on a copper stop end?

Thanks.

 

[AWheating]

use a 35mm hole saw and a stanley knife/file to tek off 1mm??

i normally use standard compression tank connectors with a 29mm hole saw.

 

[realstokebloke]

Thanks AW,

That is my fall-back i guess.

I have seen a thread on ano forum while googling that says a 38mm is actually OK - but i would have thought, if anything, too tight is better tha too loose?

I'm sure a 29mm hole you mention is req'd for 15mm pipe but my holes req'd are for 22mm pipe.

 

[realstokebloke]

use a 35mm hole saw and a stanley knife/file to tek off 1mm??

i normally use standard compression tank connectors with a 29mm hole saw.

Yes, just looked, the 29mm hole os for the 15mm pipe.

(They sound an odd size hole - to get a cutter for - too?)

 

[mountainman]

Or there is the old fashioned way.

28mm copper for a 22mm tank connector and 22mm copper for 15mm connector, heat the end of the pipe up to cherry red and melt through the tank.
Remove the burrs with Stanley, job done.

 

[AWheating]

normall its 29mm hole saw for 22mm connector, 22-25mm hole saw for 15mm connector and float valve. as a general rule every plumber should have hole saws of 22,25,29,35, and 57 with whatever you want for waste pipes ie. 40 and 50mm.

heating up pipework is how plenty of plumbers do it. Weather this damages the integrity of the plastic around the hole is debatable. I personally prefere to use a good hole saw.

 

[realstokebloke]

normall its 29mm hole saw for 22mm connector, 22-25mm hole saw for 15mm connector and float valve. as a general rule every plumber should have hole saws of 22,25,29,35, and 57 with whatever you want for waste pipes ie. 40 and 50mm.

heating up pipework is how plenty of plumbers do it. Weather this damages the integrity of the plastic around the hole is debatable. I personally prefere to use a good hole saw.

AW:

I may have forgotten to mention, these are the Guest Speedfit connectors, so i think you must mean the brass ones, sorry.

Nevertheless, 36mm is what Guest say but, as above, i just can't find one at 36mm?

MM:

I had heard that, thanks but as above, these are obviously bigger that the brass so heating pipes won't work, sorry.

So:

STILL WANTED: WHERE TO GET A 36mm HOLESAW ?

Thanks.

 

[JCplumb]

I just did a quick google and found loads, I suggest you do the same?

 

[realstokebloke]

I just did a quick google and found loads, I suggest you do the same?

I did, honest guv.

Seriously what did you type in the search (let me guess, "36mm holesaw"?)

I didn't get any - the standard set sizes seem to go 35mm the 38mm.

The 36mm results were only for specialist metal drill i think (or at least they looked bugger all like a any holesaw i've ever seen).

 

[JCplumb]

Yup, I typed ''36mm holesaw'' they started at £4 odd. They were mainly for metal but I've never seen a holesaw that's made exclusively for cutting plastic, never had a problem with mine that is made for metal. Incidentally most of the holesaws I use on plastic came in a cheap drill bit set that I've had for £20 years(ish) I wouldn't dare use them for anything other than plastic as they wouldn't be up to the job
BTW, I don't want to teach my grandmother to suck eggs or anything, but incase you didn't know - click shopping on the left of the results page

 

[WaterTight]

Last one I did I just held up the saws to the flange of the speedfit tank connector and went with the nearest I could find that would allow it to pass through but still make a seal. Don't even remember which size it was but it wasn't the recommended size. Worked fine.

 

[mountainman]

I use brass tank connectors by preference.

 

[WaterTight]

Last time I asked for some of those in the merchant I told him to swap them for speedfit when I found it was nearly £10 more for two of them.

 

[realstokebloke]

Yup, I typed ''36mm holesaw'' they started at £4 odd. They were mainly for metal but I've never seen a holesaw that's made exclusively for cutting plastic, never had a problem with mine that is made for metal. Incidentally most of the holesaws I use on plastic came in a cheap drill bit set that I've had for £20 years(ish) I wouldn't dare use them for anything other than plastic as they wouldn't be up to the job
BTW, I don't want to teach my grandmother to suck eggs or anything, but incase you didn't know - click shopping on the left of the results page

Ha ha.

I'm officially an old Granny

I didn't know that!

I do know though, thnx.

Has it got to be a "circular" hole saw (like the ones for doing ceiling downlighters) or can it be a "flat" (wood) bit?

Will one of those work anyone know?

 

[Mike Jackson]

A flat wood bit is likely to rip it to pieces. If it doesn't it will probably weaken it. The only way that manufacturers recommend is a hole saw and normally once it is in position to avoid undue stresses when man handling the cistern up into the roof space. Heated pipe will work but this is, again, not recommended by the manufacturer.

 

[Paulus]

Last one I did I just held up the saws to the flange of the speedfit tank connector and went with the nearest I could find that would allow it to pass through but still make a seal. Don't even remember which size it was but it wasn't the recommended size. Worked fine.

That's the way to do it!

 

[Acuosuo]

responses very

thanks, you right have nice day