The question was asked recently as to why a lint interceptor is needed for the washer. If you manage or have been around any type of laundry, lint is an everyday fact of life. There is washer lint and dryer lint. Both are different in some respects but in a commercial laundry, washer lint should be of concern to eliminate possible full or partial drainage clogging. Washer lint is wet, therefore; it mainly accumulates in one location which is the lint interceptor.
Lint is created by degradation over time of the item being laundered. Chemicals in the wash liquid and the mechanical action of washers (and dryers) gradually destroy fabrics. Besides these small particles of fabric, you have paper items and solid items left in pockets, debris, mud/dirt, and so forth attached to the clothing that are discharged through the lint interceptor.
Lint interceptors are sized according to the number of washing machines installed which possibly could be discharged simultaneously. This simultaneous concern is mostly for self-‐ service laundries but also must be considered for private commercial laundries.
Jay R. Smith lint interceptors are designed with two lint screens. The primary and secondary screens are of stainless steel construction and removable for cleaning purposes. The outlet connection is lower than the inlet connection.
It is recommended to offset the outlet piping up at a 45˚ angle. This serves two purposes: (1) it prevents lighter objects that pass through the screens and float on the water from sinking into the outlet pipe and then getting into the sanitary drainage system and
(2) it creates a liquid seal that serves as a trap, preventing sewer gases from entering the building through the washer. Most codes do not dictate this type of outlet arrangement but is a Jay R. Smith recommendation.
The screens must be cleaned periodically. The frequently of cleaning is dependent upon the volume of use by the washers. The cleaning frequency will have to be determined by the end user.
Please refer to the attached submittal drawing.
TROUGH TYPE LINTINTERCEPTORS
There are installations where thestandard 8910 series unit cannotbe installed. Often, an open troughlocated behind the washers isutilized. This trough can be flat orsloped but the volume must belarge enough to handle all thewashers if dischargedsimultaneously.
Whether using the trough style oranother design, Smith can usuallycreate a design that will be suitablealong with intercepting the lint anddebris. Two examples, SQ-2-3088and SQ-8-3615 are attached.
SQ-8-3615 is a flat trough designfabricated from 304 stainless steelwith two stainless steel removablefilter screens (primary &secondary) and a dome bottomstrainer covered with stainlesssteel mesh.
SQ-2-3088 is unique as it isinstalled at the low end of apoured-in-place concrete trough.A cast iron roof drain dome isconfigured over a removablestainless steel lint/sediment basket. The basket is suspended in a 20” square drainage body wherethe discharge outlet is located.
Both of these units are unique but satisfy the needs and requirements of the application.
Please refer to the submittal drawings in the original issue.
Download the original newsletter here: Vol. 3, Issue 4: 8910 Series Lint Interceptor