Soluble dye to trace the flow of water. One 200 g jar will dye about 15,000 litres/3,300 gallons of clear water; dirty water will require more dye. Blue.
https://www.bes.co.uk/drain-tracing-dye-200g-blue-1992/34391Drain Tracing Dye - 200g Bluehttps://www.bes.co.uk/media/catalog/product/d/r/drain-tracing-dye-blue-200-g_min_1992_P_1.jpg6.546.54GBPInStock/Tools & Equipment/Tools/Plumbing & Heating/Drain Equipment/Testing Equipment/Drain/Drain Dye81510221215931096536339Soluble dye to trace the flow of water. One 200 g jar will dye about 15,000 litres/3,300 gallons of clear water; dirty water will require more dye.<br>Blue.Unbranded00https://www.bes.co.uk/media/catalog/product/d/r/drain-tracing-dye-blue-200-g_min_1992_L_1.jpgadd-to-cartfacet_type:Drain Tracing Dye / Smokespecial_price:6.540000products_related:3589,3590,3591,3592,22148,4074,15176,21525,18528,10733,10729,10724sku:1992Drain Tracing Dye / Smoke3589,3590,3591,3592,22148,4074,15176,21525,18528,10733,10729,1072419926.540000No{"Colour":"Blue","Container Type":"Jar","Size":"200 g","Type":"Drain Tracing Dye \/ Smoke"}Unbranded200 g