compression and push fit

[ray316]

On polypropylene pipes why is there compression and push fit fittings. Apart from the slight difference in prices are compression fittings better than push fit for getting a secure tight fitting , would like some answers on this.
Also l'm putting a 32mm tee in my pipes under the sink so l would like to know what is the difference between 32mm 92.5 tee and a 90 degree 32mm tee. Will both work ok on draining waste water away from seperate waste runs.

 

[bengasman]

Plastic pipe is designed for plastic fittings.

92 degree is for vertical going to horizontal

 

[advancedplumber]

i take it ur talking about standard hep, speedfit or other trade plastic pipes used for domestic plimbing and heating? there is no real difference in using pushfit or compression fiiting. kind of defeats the purpose of using plastic pipe if ur going to use compession. as for waste pipes the fitting marked 92 degrees is just to allow the pipework to fall back towards the tee and down to the main soil stack or floor waste adapter.