Hi Guys New to the Forum. Spent the first 12 years of my working life in the cesspool business on long Island. Family owned. One of the first company's on long island to have a camera to locate pools. Anyway from there we pivoted to sewer and drain cleaning. Spent thousand of hours on the end of the 300 with the camera. One thing we always had on hand is a pump truck. Basicaly Every house on long island has a trap and on the north shore often 8 to 12 foot deep pipes.If there was pressure on the plugs we would pump the vent out so we could get to work. If I were to get back into business with just a van doing sewer and drain how do you all relieve pressure. Sometimes snaking through a pulled toilet or vent is impossible. Is it worth getting mabey a small pump truck to pump the vents out or do you guys call a company to do it for you.