Drilling hole in fgt

Hi!

I got 4 x 2.5 x 2 ft fgt and would like to drill a overflow outlet hole.

Can I know what diameter is recommended?

I read up that is seems there is possibility of cracks when drilling fg, is there any shops that will do it for a fee as i got quite a few holes to drill?

[striker78]

It depend on the dimension of the pipes u want to use.
there are those common grey pvc 13/16/20 to 40mm.. it is also easier to buy "hole-drill" from hardware shop to match the dimension u required.
4 foot fgt don't required large outflow pipe... IMO 20mm shuld suit the usage.
Happy DIY

[benang]

go for a hole drill from hardware shops. just don't rush/force the drill bit in and you ll be fine. let it work its own way into the fiberglass.

[yanki2]

im thinking will the hole drill bit from daisho works for fgt?

I bought my hole saw from hardware store. Managed to drill holes on my fgt already

[octane]

I don't trust tools from diaso. hehe

my guess if the daiso drill bit is stated as high speed steel, it should be ok if you planning to use it for just a few times. Cos for a 26mm hole saw, I paid around $8 for the hole saw at a hardware shop in clementi.

[canopy]

bro, which shop at clementi help to drill hole for glass tank?

I did not drill on glass, i drill on fgt, so I'm not sure if the drill bit is suitable.

[canopy]

the hardware shop provided this service right? Can let me know the address? I can ask them when I go over