You might consider PEX instead of ABS if it is for fresh water. The joining system is simple and fast and very solid. After using both, i think The savings in time and labor
When using PEX is worth it!
Re doors and windows in adobe….
I would be willing to do the “restore” on windows. But Doors…
I would be inclined to salvage the doors themselves if at all possible,
but would seriously consider installing modern steel security door frames.
I an adobe, the window and door openings “ought to have been” framed with lumber;
Either post-and-beam style or wooden lentils and frames.
One can Anchor steel door frames to the existing lumber with lags and liquid nails
Thus providing a solid secure frame for whatever door is desired.
The resulting steel and wood can then be covered the correct concrete or stucco product
Which will then give the old time look of plastered adobe.
I have long loved adobe brick as abuilding material, but only when used with post and beam construction. Unfortunately adobe is for the very rich who can affordto hire it all done… ior those with more time than money who make their own bricks and lay them themselves.
Please keep us informed, and any photos would be greatly appreciated!