Does this shower trap look ok? Why do I need a reducer?

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Hi all,

I'm fitting the shower trap and there is a reducer from the 40mm pipe to be able to fit into shower trap. Is this the norm? Why doesn't the 40mm go straight into the trap? I guess it's to accommodate a 32mm pipe? But then I thought most/all showers had 40mm waste pipe. Also do I solvent weld this in pic?
Many thanks in advance.
 

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Hi all,

Why doesn't the 40mm go straight into the trap? I guess it's to accommodate a 32mm pipe? But then I thought most/all showers had 40mm waste pipe. Also do I solvent weld this in pic?
Many thanks in advance.

Ask the Manufacturer, does seem an odd idea though. Yes, shower waste should be minimum 40mm, especially with a high flow shower. Solvent weld the reducer to the appropriate size outgoing pipe, compression joint on shower trap.
 
Thanks Hugh,
Yes, I will do on Monday. In fact, it's an iflo shower tray and waste from City Plumbing. They're only down the road so I'll go and ask them.
 
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Sure it's not a 40mm trap going into a 50mm waste pipe run?

You Sir, are bang on!, well almost. The waste pipe is 43mm so it must be a reducer to 40mm. Makes sense now. I thought all waste pipes were either 32mm or 40mm, I stand corrected. My next problem is whether there is enough of a fall. I'm praying there is!
 

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Thanks but nope, a 43mm waste pipe is a 40mm ID pipe so it is in essence it is a 40mm.

Strange though that the IFLO shower trap would reduce down, guess they must have their own specific outlet size and they supply a reducer so it fits properly.
 
Thanks but nope, a 43mm waste pipe is a 40mm ID pipe so it is in essence it is a 40mm.

Strange though that the IFLO shower trap would reduce down, guess they must have their own specific outlet size and they supply a reducer so it fits properly.

Oh well, just think that I thought you were a superhero for a short while, lol.
 
Oh well, just think that I thought you were a superhero for a short while, lol.
Hey .... so did I ... but alas just a mere mortal after all ;)

I still might redeem myself though. That's an IFLO turbo fast flow waste, they come with 40mm solvent weld reducer to allow it to be fitted to a UK sized - 40(43)mm waste pipe.
s-l225.jpg
 
Hey .... so did I ... but alas just a mere mortal after all ;)

I still might redeem myself though. That's an IFLO turbo fast flow waste, they come with 40mm solvent weld reducer to allow it to be fitted to a UK sized - 40(43)mm waste pipe.
s-l225.jpg

Thanks Rob,
You have indeed redeemed yourself, lol. 'Turbo fast flow' rings a bell now you mention it. I didn't think it was the norm, but as long as it's the norm for iflow. I'm going down City Plumbing later actually as I need a waste elbow. I'm going to take the waste down with me just for some advice (I lost the instructions) and that's imperative at my level of DIY!
 
Hi Rob,
Thank you so much for links. I went down City Plumbing earlier and they photocopied the instructions which although different, look similar to the links you sent. I was confused about this weird washer that comes with it. They were just as miffed as me when I asked them which way round it went. Anyway, good to go now I reckon. Thanks again Rob.
 

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