Once you’ve determined you’re dealing with drain flies, finding the source is the next step. Cleaning up is definitely recommended and typically for sump pumps, it’s good to use a foaming product like Invade Hot Spot would be better. The foam will be able to get into the pump, cracks and crevices where the Drain Gel is really only meant for drains in the kitchen and/or bathrooms. If there’s an area where water will run-off into sump pump, you could hang an InVade Bio Bullet inside the sump pump in the patch of the water for continuous treatment but do not submerge in the water.
No, Drain Gel will not treat plumbing lines for roaches. It is designed to treat the organic matter that builds up in your drains over time that leads to drain flies. Roaches can live in a septic tank, and can come up through the plumbing lines and make their way through the drains. However, you would not be able to use an insecticide in the actual drains. There is a product called Gentrol Aerosol IGR that is an insect growth regulator that stops the reproductive cycle in roaches that can be used in drains. Keep in mind, too, that roaches often just fall into or crawl in sinks because of the water there and do not actually come up through the drains. Please take a few moments to review our Roach Treatment Guide for more tips.
Drain Gel has a shelf life of several years when stored at room temperature out of direct heat or freezing temperatures.