Thread: Best source for DWV fittings in Victoria?

Granted I am out of capital cities but I buy from Samios Plumbing, they have places all over the big cities..

Just in case you missed it in the ducting sticky I indicate that the only 6" DWV fitting worth buying is the large radius 90º bend otherwise the stormwater fittings are all OK. For 4' sections there are no stormwater 4" fittings available so DWV is the only option available.

Originally Posted by BobL

Just in case you missed it in the ducting sticky I indicate that the only 6" DWV fitting worth buying is the large radius 90º bend otherwise the stormwater fittings are all OK. For 4' sections there are no stormwater 4" fittings available so DWV is the only option available.

I did see that but wasn't 100% sure about whether stormwater and DWV are interchangeable/compatible with regards to I.D. so thought that if I stick to all DWV then I hopefully won't run into any problems. There does seem to be a wider range of fittings in DWV - particularly from Iplex which may or may not be useful - DWV | Iplex Australia

Yes they are interchangeable and thanks for pointing out that this is not specifically mentioned in the sticky document.

There are usually more DWV fittings available than stormwater usually because this saves a supplier from stocking both of the same kind of the lesser used fittings, and because DWV can be used for stormwater but not the reverse.

The biggest saving is usually on the pipe. From my supplier, 6m x 150mm is (ex GST) $63 for DWV versus $48 for stormwater.

Originally Posted by BobL

Yes they are interchangeable and thanks for pointing out that this is not specifically mentioned in the sticky document.

There are usually more DWV fittings available than stormwater usually because this saves a supplier from stocking both of the same kind of the lesser used fittings, and because DWV can be used for stormwater but not the reverse.

The biggest saving is usually on the pipe. From my supplier, 6m x 150mm is (ex GST) $63 for DWV versus $48 for stormwater.

Cheers Bob - that explains a few things and clears things up.

Just some info for those buying VC duct bits - in my local area Reece's prices were about four times that of Bunnings!

Originally Posted by RSD

Just some info for those buying VC duct bits - in my local area Reece's prices were about four times that of Bunnings!

Yeah that's been reported before, try to find a mob that only sell pipe and fittings - not plumbing all sorts,

Whats the difference between DWV and just Storm water pipe ?

Edit.
I then went and googled . should have done it first . Sorry .


The only real difference is that DWV PVC is not made to handle pressurized uses like schedule 40 parts are. Instead, DWV pipe and fittings are made to handle a different class of uses – Drain, Waste, and Vent (hence the name DWV). ... Another difference between DWV and standard PVC parts is the end types.

Stormwater and DWV pipes are not pressure rated but the DWV is much stronger than stormwater. 90mm stormwater pipe and 100mm DWV pipe are commonly connected together with a 100mm x 90mm reducer to connect round 90mm pvc downpipes to a 100mm DWV subsurface drain pipe.


Is this a good way for getting 100 instead of 90MM ?

What are the other benefits in using it ?

Rob

Originally Posted by auscab

Whats the difference between DWV and just Storm water pipe ?

DWV generally has thicker wall thickness - which has pro's and con's - thicker walls means more plastic so more expensive to manufacture, and heavier which is a consideration when suspending the duct from the roof etc, but thicker walls should be able to better survive if you accidentally put your vacuum into negative numbers by having all the blast gates closed - not sure if anyone has ever imploded a dust collection system but...

BobL pointed out that the DWV 90 deg. bends are a much better radius for our application too.

**WARNING** for North American readers:

In the US and, I think, Canada, DWV (Drain/Waste/Vent) pipe is compatible with pressure pipe (Schedule 40) fittings. For 6" trade size pipe OD is 6.625" for both.

The smaller size, 6.275" OD, is called S&D (Sewer and Drain). The two common types of this are ASTM2729 for the thinnest wall and SDRxx (ASTM3034) for the thicker walls. SDR35 is the most commonly available wall thickness. It's the easily recognized Green sewer pipe.

My local trade link was alot cheaper then Bunnings/Reece.

Don't forget to check Facebook/Gumtree

Better yet ask around if anyone has some plumbing mates that might just sell you some pipe at closer to trade prices

Originally Posted by RSD

DWV generally has thicker wall thickness - which has pro's and con's - thicker walls means more plastic so more expensive to manufacture, and heavier which is a consideration when suspending the duct from the roof etc, but thicker walls should be able to better survive if you accidentally put your vacuum into negative numbers by having all the blast gates closed - not sure if anyone has ever imploded a dust collection system but...

Storm and DWV pipe are classed as non-pressurised pipes and so are not pressure rated but are rated for stiffness under Australian Standard 1260. The test is an impact test on the outside and the ratings are labeled as SNx.x Variable Stiffness is achieved mainly by increasing the wall thickness although in the case of SN1.5 stormwater a foam core is used to reduces weight,

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Stormwater is usually SN1.5 while DWV is SN4 - SN8

PVC stormwater and DWV Fittings with inspection ports and rubber O-rings are pressure tested (AS 1462.8) to 85 kPa 340" of water or 1.23 psi.
Typical DC pressures are <15" of water.

The other BIG difference is that the pressure testing is for outward pressure, whereas DC pressures are negative. Most pipes are much stronger in compression than in expansion so the likelihood of implosion is further reduced.

Not that I enjoy plumping for Bunnings, but for the pipe alone....

Reece 150mm 6 mtr $112.57 Stormwater Pipe PVC Plain 150mm from Reece
Bunnings $79.36 Holman 150mm x 6m Stormwater Pipe | Bunnings Warehouse

I'm sure a trade account at Reece would take care of a lot of the difference, but I don't got one of those.

Originally Posted by Neil T

Not that I enjoy plumping for Bunnings, but for the pipe alone....

Reece 150mm 6 mtr $112.57 Stormwater Pipe PVC Plain 150mm from Reece
Bunnings $79.36 Holman 150mm x 6m Stormwater Pipe | Bunnings Warehouse

I'm sure a trade account at Reece would take care of a lot of the difference, but I don't got one of those.

Bunnings can be like that for electrical cable as well and sometimes sell it for less than trade discount from an electrical wholesaler. You get stung though on the ancillary bits if you don’t know your prices