****** - Verified Buyer
4.5
Used the MTM Button Nose 1/4" F 4.5 Orifice Laser Fixed Sewer Jetter Nozzle 4000 PSI on a Sewer Jetter Hose 4400 PSI 1/4" NPT x 100' Black Thermoplastic Weather Resistant and propelled water through them with a 2,300 PSI 2.3GPM gas-powered pressure washer. Blew through three packed-solid teepee clogs in a 4" sewer line and opened the line completely in about an hour.4.5 orifice size should be ideal for <3,000 PSI and <3.0GPM pressure washers. If yours is beefier, step up a size or two. The hose was more than flexible enough to clear a street ell and sanitary tee in a 4" line - went in smoothly, came back out smoothly, didn't try to kink or anything. I did uncoil the hose before using it - this will make life a lot easier as the hose will try its level best to coil up on you if you don't stretch it out flat first.Please note that this is likely NOT a good thing to use to unclog a jammed-up toilet - use a toilet auger for clearing a blockage within a toilet proper. If you're positive the clog is beyond the toilet, just drain and pull the toilet if you can do so without dumping nasty everywhere, and feed right into the pipe, as this probably won't fit through a toilet's innards.Using on blackwater lines (e.g., sewage lines or toilet drains): Let it feed at its own pace - let the water coming out the angled jets pull it into the line - and if it stops feeding, use bursts of pressure and a slow in-and-out motion to permit it to cut into the clog and clear the debris. Once you can hear it drop into the sewer or septic tank (and yes, you'll literally hear a sound difference once the tip passes out of the other end of the line), flood the pipe with hot water to ensure steady drainage. Finally, slowly extract while applying pressure and continuing an in-and-out motion to clean the pipe insides a bit to reduce the probability of a repeat clog. I used the same pressure washer that fed it to clean it afterward for storage.
