Anyway, pipework removed, no splits in the pipe, pump removed, need to cut the wire, and take apart to fix, but no access found onsite, how to reinsulate the wire once found (as it's buried, can't find the wire!), could cut it at pump end, but then live electricity would be in the water and fry my fishes.
What on earth are you on about?
You shouldnt need to cut any wires to do any work here.
Disconnect the UV filter by opening it and loosening the terminals.
NEVER EVER CUT A 230V CABLE THAT CARRIES ELECTRICITY TO A SUBMERGED PUMP, except where the cut will be above, and well clear of, the water surface.
Whoever buried the UV filter wants shooting. All connections should be accessible. Stand it on a paving slab.
Col - the level that the water reenteres the pond is higher than the pump? Don't understand.
Steve - the pump is normally submerged in the pond, it then pumps the water to the UV filter box, that was partially embedded in my rockery, as it's a big old ugly box, with the top left clear for maintainence, as the instructions that came with it suggested. This meant that the input to it was underground, or under the rockery.
The pump isn't working, the UV box works fine, but as there is no water being pumped into the UV box, both have been switched off, and unplugged, I'm not about to be cutting live wires! I'm an engineer!
The cables are buried, along with my garden lights, that you bury the cable, then the lights 'spikes' the cable to pick up the 12V, but the garden is so well grown now, that I can't source the pump or UV box cables, with out digging up the garden, or dismantling the pond brickwork surround. So the only cable available to remove the pump is by cutting the cable where it enters the pond (not a good idea), to take it indoors, to enable me to take it apart and fix it properly, as working at the end of the garden isn't so good, especially as some bees have decided to take up residence in the area.
I just think I didn't explain properly. Next thing is - how to fix the pump? I've emailed the manufacturer, Blagdon, it's an 18w Minipond 900 pump if anyone knows it?
And if anyone is to blame for hiding the wiring - unfortunately, it's me, I have a gun, do I really need to shoot myself? bit harsh!
To re-iterate - the pump has a 20 foot lead, buried, and can only access the last 2 feet, but to fault find the pump requires the pump to be removed to a workshop, but the wire is buried, I'm never in a month of Sundays gonna be cutting live wires, or cutting which would electrocute my fishes! They were tiddlers when bought, now over 8" long. (hope thats the sign for inches, not feet!)!
We bought about 10 at the time, and named them after friends and family, 3 remain. Darren (me), Michelle (my better half), and we ran out of names for the last one, lol so he was called "the fish with no name, no really thats his name"...It was a sad day telling the kids, sorry Carl, you've been eaten by a heron, or Keith, sorry, you swam into the pump and got mashed...