Weil McLain 590-317-651 Silicone Tube
The Weil McLain 590-317-651 Silicone Tube is a 19 in. length of white silicone tubing with a 0.150 in. inside diameter and a 0.270 in. outside diameter. The catalog designation reads "Tube Sili .150ID x .270OD x 19 W," and a distributor lists it as white silicone tubing, 19 inches long with a 1/16 in. wall, which agrees with the wall the two diameters produce. It is a flexible, heat-tolerant silicone line supplied cut to length, so you can fit it to a barb without trimming a long roll.
The 0.150 in. inside diameter is larger than the 1/8 in. bore of the red silicone 590-317-650, so the two are not interchangeable on a barb. A larger inside diameter fits a larger barb, and a line that is too loose on a smaller barb can pop off or leak. Match the original line's inside diameter and length before you order. The Weil-McLain 590-317 series also includes the 590-317-630, 590-317-631, 590-317-632, 590-317-645 and 590-317-647 silicone tubes.
A silicone line carrying a pressure signal should be clean, dry and unkinked. Before you install the new line, inspect the barb for debris and clear it, push the tube fully onto the barb so it seats past the ridge, and route it with a slight downward slope or drip loop so condensate cannot sit in a low spot. Avoid sharp bends, hot surfaces and any contact with sharp jacket edges. After the boiler has run a full cycle, recheck the connections. White silicone lines are easy to inspect for moisture and discoloration, which makes them simple to troubleshoot at annual service. Confirm compatibility with your equipment before you order.
Key Benefits
- White Silicone Construction: Flexible and heat-tolerant, and easy to inspect for moisture or discoloration.
- 0.150 In. ID x 0.270 In. OD: A larger bore than the 1/8 in. tube, for a larger barb.
- 19 In. Cut Length: Supplied cut to length, so you do not need to trim a long roll.
- Part of the 590-317 Silicone Series: Sits with the 590-317-650 and the other 590-317 silicone tubes.
Common Questions
- What size is the 590-317-651? 0.150 in. inside diameter, 0.270 in. outside diameter, 19 in. long, in white silicone.
- Can I use the 590-317-650 instead? Not if the barb needs the larger bore. The 590-317-650 has a 1/8 in. inside diameter, so match the inside diameter to your original.
- How do I avoid false lockouts? Keep the line clean, dry and unkinked, seat it fully on the barb, and route it with a drip loop.