As mentioned in my other post(s), I'm planning to switch over from my main drilled well (submersible pump) to the old backup well (shallow dug well, antique piston pump).
I know very little information about this dug well other then it hasn't been used in a long time, and I believe it lives under the concrete slab in the middle of the yard.
It had been used to support a house full of nuns up until the drilled well was installed in 1985. The drilled well was installed because the dug well could not support their water requirements during the dry season (assuming ~10 nuns plus visitors).

For drilled wells, I am pretty sure I have the well shocking procedure nailed down. For a dug well, does this apply?

I ran the pump for about an hour last night (still in need of a rebuild) and pulled a couple samples to send in for testing (mineral content and bacterial).

I will be connecting the well to the whole house filtering system this weekend (ball valves in place to turn off which ever well/pump is not in use).

Besides that, any other prep work I should consider before switching over to this well?

 

What reason are you doing this again?

In the states you cannot have two wells connected to the same system/home... Cross contamination....

 

Our main drilled well is leaking where the head was extended above grade (original drilled well head was ~5ft below grade). If the tests all come back good, we'll switch over to the dug well until the drilled well repair work is completed.

I knew it wasn't acceptable in some (most) states to have both wells connected to the house. Ours is currently connected, just not with the second well using the filters (connection is after the filters and softener). I was debating if I should add check valves to both feeds between the ball valves and tee. Might do this regardless as a safety measure.

 

Probably should add unions and ball valves to where the lines connect. This way you can physically disconnect one or the other...

Not sure the codes in Canada so cant really comment on whats allowed.

 

I'll double check the local code on what is acceptable.
I won't believe it is ok based on it being done that way already.

 

I guess there is no inspection hole on that big lid ?
Would be useful to find out the diameter and depth of water to determine the amount of bleach required to shock it.
Since it has been idle since 1985 (almost 30 yrs !), I would also be tempted to drain off alot of that water just to freshen it up. Without knowing how much volume of water you have in there, not sure how much to drain off for a 'cycle'.