{"product_id":"tnp111e-2pr","title":"PresAirTrol TinyTrol 2 PSI Pressure Switch [21A, SPDT, 1\/8\" MPT] (TNP111E-2PR)","description":"\u003cp\u003eThe PresAirTrol TinyTrol TNP111E-2PR is a pressure-actuated SPDT switch with a 2 PSI specification, 21A rating and 1\/8-inch MPT connection. Those ratings are critical when selecting a replacement control for an existing installation.\u003c\/p\u003e\u003ch3 style=\"margin:16px 0 5px;padding:0;\"\u003eHow This Component Fits the System\u003c\/h3\u003e\u003cp style=\"margin-top:0;\"\u003ePool and spa heating systems rely on coordinated water flow, correctly rated electrical components, and safety devices that stop heating when operating conditions are not satisfied. Heater service is therefore more than a parts swap: the replacement must agree with the original model, wiring arrangement, heater capacity, and installation environment. Work involving line voltage, capacitors, or combustion exhaust should be performed by a qualified technician following the applicable manufacturer service manual.\u003c\/p\u003e\u003cp\u003eCheck the original switch label, required pressure setting, terminal configuration and connection thread before ordering. A similar-looking pressure switch with a different actuation point or electrical rating is not an equivalent replacement.\u003c\/p\u003e\u003ch3 style=\"margin:16px 0 5px;padding:0;\"\u003eReplacement and Maintenance Considerations\u003c\/h3\u003e\u003cp style=\"margin-top:0;\"\u003eA well-planned repair includes inspecting the condition of the neighboring assembly before reinstalling the replacement. Look for worn mating surfaces, loose retainers, damaged connections, corrosion, or other conditions relevant to the component being serviced. Recommission the system using the manufacturer procedure rather than assuming that installing a new part alone resolves the original operating problem.\u003c\/p\u003e\u003cp\u003eFor this particular listing, the ordering reference is TNP111E-2PR. The identifying description is PresAirTrol TinyTrol 2 PSI Pressure Switch [21A, SPDT, 1\/8\" MPT] (TNP111E-2PR). Matching the original unit and the manufacturer parts illustration is particularly important where closely related models have different mounting or electrical requirements.\u003c\/p\u003e\u003ch3 style=\"margin:16px 0 5px;padding:0;\"\u003ePractical Features and Service Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSupports a targeted repair of the existing heating system instead of automatically replacing the complete heater.\u003c\/li\u003e\n\u003cli\u003eMatching electrical ratings and connector layouts helps avoid incompatible service parts.\u003c\/li\u003e\n\u003cli\u003eWater-flow and high-limit safety devices must remain functional after any repair.\u003c\/li\u003e\n\u003cli\u003eTechnicians should diagnose the underlying fault before fitting a replacement component.\u003c\/li\u003e\n\u003cli\u003eService access and installation clearance affect whether the repair can be carried out correctly.\u003c\/li\u003e\n\u003cli\u003eManufacturer instructions and local codes govern safe commissioning after heater maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PresAir Trol","offers":[{"title":"Default Title","offer_id":49882340786331,"sku":"TNP111E-2PR","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1751\/9347\/files\/47-369-1100_XL_776b5c5f-58e5-45f1-9e7c-71dcb00c8984.jpg?v=1792628954","url":"https:\/\/www.bathandspaparts.com\/products\/tnp111e-2pr","provider":"Bath and Spa Parts Online","version":"1.0","type":"link"}