Welcome to the forum. Although you can post in any forum, the USA forum is here in case of local regs or laws
150 centers.
yes sorry was think of something else
what's behind those covers? 15mm compression or 3/4 bar mixer connections?
bar mixers - once fitted - are a god send. so easy to change.
15mm compression types can be a pain if you can't get old olives to budge especially if new shower won't go fully back to tiles without doing so
concealed showers are work of the devil.
the better a bathroom looks the more of a nightmare it is once something starts dripping, not flushing etc.
that's usually when the guy who installs them won't come back and schmucks like me turn up.
We recommend City Plumbing Supplies, BES, and Plumbing Superstore for all plumbing supplies.