About 18" diameter
This thing is heavy duty. I’ve placed it in my yard covering it with rocks. I don’t use a riding lawn mower but I wouldn’t think you would have an issue with the wheels passing over. To really answer your question you probably need to ask the manufacturer as I’m doubtful anyone here will be able to provide a weight limit for this item.
The cover will seal and my cover fits perfectly. Should work fine.
The basin walls are tapered but why would you not put a float to control your pump and not worry about the volume.
Yes I bought it and put it together with mo problem
This unit is well made and heavy duty, but as far as freezing ground with expansion and contraction I honestly dont know. Sorry have no experiance with using product outdoors.
We had to order the cover online. They carried the sump pump & basin in the store, but not the cover.
Mine is in the ground, so I can't check the information on it. The best I can tell you is to stop by Home Depot and look at the ones they have in stock and hope the information is on the basin.
It's a good quality sump basin for which you can buy a matching lid - it worked fine for my application. As for cutting and gluing, I don't think it's going to work as it's make of the kind of plastic that most glues just won't stick to - especially in wet conditions. You could try to find the manufacture and see what they may have to say. All the best........
That should work. If you are installing it in a location where the ground freezes, I am not sure if the tub is rated to withstand freeze and thaw cycles. You may want to check with the manufacturer. Also the cover has a slight convex shape to it so you will need to recess the tub a little below the surface of the concrete floor so rainwater will reach the drain holes.