What you have is a ball check valve, and you could have a combo Sanitary/Storm System, The ones I have seen use a squeeze type insert into the floor drain, and that nut you are looking at is just a clean-out plug to by-pass the check valve for drain cleaning.(:
You can try and drill it out and replace it with a new one, I have two new valves in my garage. However; what I would do is bust-up that section of concrete and replace that section of pipe with all new parts, also think about calling a licensed plumber like A-General Plumbing & sewer service company in NJ to remove the storm sewer connections and pipe it separately to the outside of the house to avoid flooding when heavy rains occur.
You hire a plumber to put in a one way sewer drain valve.
check at a plumbing supply , for this, [ball check ] i also have had good louck by pushing a Tennis ball in to mine then replacing the top plate. Acts like a stopper,
I am facing this same issue with a basement installation and plan to use a backwater swing check valve, available thru McMaster-Carr on the web.
You can not. There is an anti siphon valve in the filler neck. You have to remove the filler neck from the tank and drain from there.You can not. There is an anti siphon valve in the filler neck. You have to remove the filler neck from the tank and drain from there.
there isn't a drain plug, you will have to remove the bottom hose
Have the main drain cleaned or remove the fixtures and put plugs in each line.OrCall a licensed master plumber and ask about having a back water valve (check) installed on the branch line leading from these fixtures so you will only get flow in one direction
Doesnt have one, you have to remove the bottom hose to drain coolant.
Remove the lower radiator hose.
If it still works, it will open before the pool is completely empty. But are you sure the valve is hydrostatic? If it is not, then you will need to shop-vac the water remaining over the bottom drain, remove the drain cover, shop-vac the water under the cover, and then remove the lug nut and slide out the (manual) relief valve.
That depends entirely on your house. Many basements never flood.
If there is no drain valve at the radiator you can drain the system at the drain valve on the boiler
What do you wish to do, drain the coolant or remove trapped air from the system? To drain coolant, there usually is a drain valve located at the base of one of the radiator tanks, there is one tank on each side of the radiator. If it is not there or broken, just remove the lower radiator hose, ENGINE COLD ONLY.