My sump's lid hasn't been opened since years.
I want to open it, and tried pulling it with all the force I could apply but it didn't make any difference.
I tied a rope to the handles and pulled the rope, without any success.
How do I take it out?
Edit:
Thanks to @Tetsujin I used a little water and scraped the sides with a knife. Repeated it for about 10 times and it came out !
Pressure washer and a rubber hammer.
First, blast the washer round the joint for a few minutes, then bang around the edges & corners with the rubber hammer. You could also try running a steel rule round the crack, if one will fit.
Rinse & repeat as necessary.
You might gain a bit of traction with a heavy-duty screwdriver or small jemmy bar on the widest gap. I used to carry a sacrificial screwdriver with a thinned blade tip to use as a lever in this type of situation. You often wreck them & have to replace.
Don't use a steel hammer, for obvious reasons.
tbh, you're not going to get much purchase using tiny keys like that & they don't look strong enough to use a big lever on, but for a one-off lift it doesn't seem worth buying heavier-duty keys. Alternatively, hire a manhole cover lifter - but take those keys with you for sizing, to make sure it will fit something that small.
Manual & hydraulic…
