{"product_id":"mcalpine-shallow-seal-trap-st90cpb-s-53-slim","title":"McAlpine ST90CPB-S-53 Shallow Shower Trap – 90mm | 53mm Height | 25mm Seal","description":"\u003ch2\u003eMcAlpine Shallow Shower Trap — 90mm — 53mm Height — 25mm Seal — ST90CPB-S-53\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eMcAlpine ST90CPB-S-53\u003c\/strong\u003e is an ultra-low profile shallow shower trap engineered for installations where sub-floor clearance is severely restricted. At just 53mm overall height, it is one of the slimmest 90mm shower traps available whilst maintaining a 34 litre\/min flow rate and full BS EN 274 compliance. The polypropylene body is supplied with a removable 110mm chrome plated brass flange and all fittings for a complete installation. Ideal for timber floor constructions, retrofit projects, and first-floor bathrooms with minimal joist depth.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#f8f8f8;border:1px solid #ddd;border-radius:4px;padding:12px 16px;margin-bottom:20px;\"\u003e\n\u003cstrong\u003e⚠️ Check clearance before ordering.\u003c\/strong\u003e This trap requires \u003cstrong\u003e53mm of clearance beneath the shower tray\u003c\/strong\u003e. Confirm your sub-floor depth before purchasing. Note: this trap has a \u003cstrong\u003e25mm water seal\u003c\/strong\u003e — if you require a deeper 50mm seal for better odour protection, see the \u003ca href=\"\/products\/mcalpine-st90cpb-s-70\"\u003eMcAlpine ST90CPB-S-70 (70mm height, 50mm seal)\u003c\/a\u003e.\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e53mm overall height\u003c\/strong\u003e — one of the slimmest 90mm shower traps available; suits severely restricted sub-floor depths\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25mm water seal\u003c\/strong\u003e — meets minimum UK building regulation requirement for odour protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e34 litres\/min flow rate\u003c\/strong\u003e — high drainage performance; prevents water pooling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e90mm waste hole\u003c\/strong\u003e — fits standard shower trays with 90mm waste apertures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1½″ BSP thread\u003c\/strong\u003e — standard UK connection size\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemovable 110mm flange\u003c\/strong\u003e — chrome plated brass; easy cleaning and debris removal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1½″ solvent weld outlet\u003c\/strong\u003e — secure, leak-free connection to waste pipe\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete installation kit\u003c\/strong\u003e — 135° bend, BSP coupling nut, and 1½″ universal connector included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBS EN 274 compliant\u003c\/strong\u003e — tested to BS EN 274-1:2002 and BS EN 274-2:2002\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specification\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e McAlpine\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e ST90CPB-S-53\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e ST90CPB-S-53\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEAN:\u003c\/strong\u003e 5013512012530\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Shallow shower trap\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWaste hole diameter:\u003c\/strong\u003e 90mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall height:\u003c\/strong\u003e 53mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnder-tray clearance required:\u003c\/strong\u003e 53mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater seal depth:\u003c\/strong\u003e 25mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow rate:\u003c\/strong\u003e 34 litres\/min (tested under 15mm constant head, BS EN 274-2:2002)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread size:\u003c\/strong\u003e 1½″ BSP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet:\u003c\/strong\u003e 1½″ solvent weld\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlange diameter:\u003c\/strong\u003e 110mm (removable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlange finish:\u003c\/strong\u003e Chrome plated brass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody material:\u003c\/strong\u003e Polypropylene\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.3kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards:\u003c\/strong\u003e BS EN 274-1:2002 \u0026amp; BS EN 274-2:2002\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat’s Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMcAlpine ST90CPB-S-53 shallow shower trap body\u003c\/li\u003e\n\u003cli\u003e110mm chrome plated brass removable flange\u003c\/li\u003e\n\u003cli\u003e135° bend\u003c\/li\u003e\n\u003cli\u003eBSP coupling nut\u003c\/li\u003e\n\u003cli\u003e1½″ universal connector\u003c\/li\u003e\n\u003cli\u003eInstallation instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSuitable For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eInstallations with severely restricted sub-floor clearance (as little as 53mm)\u003c\/li\u003e\n\u003cli\u003eTimber floor constructions and first-floor bathrooms with minimal joist depth\u003c\/li\u003e\n\u003cli\u003eRetrofit shower installations in existing bathrooms\u003c\/li\u003e\n\u003cli\u003eWet room conversions with shallow floor build-ups\u003c\/li\u003e\n\u003cli\u003eApartment and flat renovations with concrete floors\u003c\/li\u003e\n\u003cli\u003eAny installation requiring a 90mm waste hole trap with minimal height\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAlso Available — McAlpine Shallow Shower Traps\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/mcalpine-st90cpb-s-70\"\u003eMcAlpine ST90CPB-S-70 — 90mm, 70mm Height, 50mm Water Seal\u003c\/a\u003e — deeper seal for better odour protection where 70mm clearance is available\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/90mm-shallow-shower-trap-70mm-high\"\u003eMcAlpine ST90CB10-70 — 90mm, 70mm Height, 50mm Seal, Multifit Outlet\u003c\/a\u003e — suits tray thickness 0–23mm; Multifit outlet for plastic, copper \u0026amp; lead pipe\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCoordinate Your Shower Installation\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/shower-trays\"\u003eShower Trays\u003c\/a\u003e — browse compatible low profile trays\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/shower-enclosures\"\u003eShower Enclosures\u003c\/a\u003e — complete your shower installation\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/showering\"\u003eShower Valves \u0026amp; Accessories\u003c\/a\u003e — valves, heads, and arms\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhat clearance does this trap require beneath the shower tray?\u003c\/h3\u003e\n\u003cp\u003eThe McAlpine ST90CPB-S-53 has an overall height of \u003cstrong\u003e53mm\u003c\/strong\u003e and requires \u003cstrong\u003e53mm of clearance beneath the shower tray\u003c\/strong\u003e. This makes it one of the slimmest 90mm shower traps available and suitable for installations where even the ST90CPB-S-70 (70mm) would not fit. Measure the available depth between the underside of your shower tray and the floor before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is the difference between the ST90CPB-S-53 and the ST90CPB-S-70?\u003c\/h3\u003e\n\u003cp\u003eBoth are McAlpine 90mm shallow shower traps with the same 34L\/min flow rate and BS EN 274 compliance. The key differences are height and water seal depth. The \u003cstrong\u003eST90CPB-S-53\u003c\/strong\u003e (this product) is \u003cstrong\u003e53mm high with a 25mm water seal\u003c\/strong\u003e — the slimmest option, suitable for the most restricted installations. The \u003ca href=\"\/products\/mcalpine-st90cpb-s-70\"\u003e\u003cstrong\u003eST90CPB-S-70\u003c\/strong\u003e\u003c\/a\u003e is \u003cstrong\u003e70mm high with a superior 50mm water seal\u003c\/strong\u003e — better odour protection, recommended where 70mm clearance is available. If you have the space, the ST90CPB-S-70 is the preferred choice for its deeper seal.\u003c\/p\u003e\n\n\u003ch3\u003eWhat size waste hole does this trap fit?\u003c\/h3\u003e\n\u003cp\u003eThis trap is designed for shower trays with a \u003cstrong\u003e90mm waste hole\u003c\/strong\u003e and a \u003cstrong\u003e1½″ BSP thread\u003c\/strong\u003e. This is the standard waste hole size for the majority of UK shower trays. Check your tray specification before ordering if you are unsure.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is the water seal depth?\u003c\/h3\u003e\n\u003cp\u003eThe water seal depth is \u003cstrong\u003e25mm\u003c\/strong\u003e — the minimum required by UK building regulations. The water seal is the depth of water retained in the trap that prevents sewer gases from entering the bathroom. If you have sufficient clearance (70mm), the \u003ca href=\"\/products\/mcalpine-st90cpb-s-70\"\u003eST90CPB-S-70 with its 50mm seal\u003c\/a\u003e provides significantly better odour protection and is less likely to evaporate in infrequently used showers.\u003c\/p\u003e\n\n\u003ch3\u003eWhat type of outlet connection does this trap use?\u003c\/h3\u003e\n\u003cp\u003eThe outlet is \u003cstrong\u003e1½″ solvent weld\u003c\/strong\u003e, connecting to standard 40mm (1½″) solvent weld waste pipe. A 135° bend, BSP coupling nut, and 1½″ universal connector are included to allow flexible pipe routing beneath the tray.\u003c\/p\u003e\n\n\u003ch3\u003eIs this trap BS EN 274 compliant?\u003c\/h3\u003e\n\u003cp\u003eYes — the McAlpine ST90CPB-S-53 is fully compliant with \u003cstrong\u003eBS EN 274-1:2002\u003c\/strong\u003e (requirements) and \u003cstrong\u003eBS EN 274-2:2002\u003c\/strong\u003e (test methods), the relevant British and European standard for sanitary waste fittings.\u003c\/p\u003e\n\n\u003ch3\u003eCan I order if the item shows as out of stock?\u003c\/h3\u003e\n\u003cp\u003eYes — this product is available to order even when stock shows as zero. Please allow additional lead time and contact us at \u003ca href=\"mailto:customerservice@bubblegumbathrooms.co.uk\"\u003ecustomerservice@bubblegumbathrooms.co.uk\u003c\/a\u003e for availability.\u003c\/p\u003e","brand":"McAlpine","offers":[{"title":"Default Title","offer_id":53020409528657,"sku":"ST90CPB-S-53","price":35.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0997\/3687\/9441\/files\/ST90CPB-S-53.png?v=1770762816","url":"https:\/\/bubblegumbathrooms.com\/products\/mcalpine-shallow-seal-trap-st90cpb-s-53-slim","provider":"Bubblegum Bathrooms","version":"1.0","type":"link"}