Strap on boss for 80mm downpipe

[stratplus]

why would you need a strap on for a rwp?

Boiler condense? If combined sewer/rainwater

 

[AWheating]

Boiler condense? If combined sewer/rainwater

pointless tho as you need an air break between the two so its best to use a branch and bend.

 

[stratplus]

pointless tho as you need an air break between the two so its best to use a branch and bend.

Seen plenty go straight into downpipe with a blob of silicon.
Whats the air break for, incase the downpipe gets blocked? Most boilers have a condense trap so no smells.

 

[AWheating]

yeah, if drain/rwp blocks with leaves like most have today with this wind. sometimes a hopper is best if room.

 

[stratplus]

So if you were to use a downpipe for a condense you'd use downpipe branch and?

 

[tamz]

A bend then drop your 1/14" or 1 1/2" into it to create an air break.
If you don't have a break and the conductor chokes the boiler will fill with rainwater.

 

[tamz]

Like this

 

[AWheating]

yep as tamz has explained, good picture.