NSS 2690251 In-Line Filter Housing for NSS Floor Scrubbers. This durable white plastic housing consists of two parts which thread together with the 1/2" diameter male fitting, NSS 2490981 (not included). Found on the solution line tubing which feeds the electronic solenoid valve or manual control valve. This housing holds the in-line filter screen (NSS 2690241) with the assistance of a red poly gasket (seal). Used on many popular NSS floor scrubber models: Wrangler 26-VS, 27, 33, 2016, 2730, 3330, and others. One filter housing is required per unit. Priced Each. Replaces NSS 2690251, 26-9-025-1. Our Part Number NSS 2690251.