Could you let me know the advantages/disadvantages of fitting an internal svp in my new extension.
I am planning on fitting two bathrooms upstairs, and I am looking for advice.
Many thanks
Internal Soil vent pipe
The advanateges/disadvantages depend on the site layout. Internal SVPs are more discreet and tend to be used when a bathroom/wc facility is in an awkward position, typically when not located on an external wall. External SVPs may not be the prettiest thing in the world, but, if owt goes wrong, it's a damn sight easier to gain access and to maintain. Personally, I'd go for the external pipe everytime.