Monthly Archives: October 2021

While lookin through Chicago fire photographer Steve Redicks assortment of images he shot a few weeks ago at 4-11 security flame, a thing found my personal attention.

While the rapidly spreading flame used the big store designing on Chicagos West Side, entrance corporations were gearing doing prevent they in its records, and that also called for liquids — lots of it.

Chicagos drinking water system is strange because its of low-pressure, large quantity concept. The unrestricted water resource are body of water Michigan and h2o spikes through its mains about 35 to 40 psi. While that does not sound like much to most much more familiar with greater pressure methods, remember the fact that despite the presence of big sizes streaming, the stress hardly ever falls above 15 psi.

Engine 26 took a hydrant within part of west and 21 st road, about 50 % a prevent from fire, and since per Chicago SOPs, produced the hydrant relationship with hard sucking, as all added security companies have to accomplish. Right now, as all flame aquaphobes determine, we cant draft from a closed hydrant technique, so then, the reason why make use of the danger to muscles the tough sucking in place?

Quick. The use of tough sucking supplies an optimal 6-inch waterway within the 4 1/2-inch hydrant outlet directly into the push sauction manifold utilising the huge half intakes, guaranteeing least rubbing reduction during high-volume procedures.

Remember the fact that Chicago employs old design rubber covered tough suction hose pipe definitely ranked for writing and pressurized process. A few of the more modern fashion transparent silicone hose pipe, while great for writing, is not built to get in touch to a pressurized liquid origin. (more…)