{"product_id":"ariston-45-degree-coaxial-elbow-pack-of-2-60-100mm-se-flue-bend-next-evo-x-11-lpg-16-natural-gas","title":"Ariston 45 Degree Coaxial Elbow Pack of 2 — 60\/100mm SE Flue Bend Next Evo X 11 LPG 16 Natural Gas","description":"\u003cdiv style=\"font-size:16px;font-family:Arial,Helvetica,sans-serif;color:#1a1a1a;max-width:900px;margin:0 auto;line-height:1.6;\"\u003e\n\u003c!-- ── INTRO ─────────────────────────────────────────────────────── --\u003e\u003cp style=\"margin:0 0 18px;\"\u003eThe \u003cstrong\u003eAriston 45 Degree Coaxial Elbow (MPN 3318004)\u003c\/strong\u003e is a \u003cstrong\u003egenuine Ariston flue accessory\u003c\/strong\u003e for the 60\/100mm SE coaxial flue system, supplied as a \u003cstrong\u003epack of two elbows\u003c\/strong\u003e. Used to introduce a \u003cstrong\u003e45° directional change\u003c\/strong\u003e into the flue run — individually to navigate a single-plane offset, or used as a pair to achieve a full 90° direction change via two sequential bends. Compatible with the \u003cstrong\u003eAriston Next Evo X 11 LPG (3632535)\u003c\/strong\u003e and \u003cstrong\u003eNext Evo X 16 Natural Gas (3632533)\u003c\/strong\u003e gas instantaneous water heaters and the wider Ariston 60\/100mm SE coaxial accessory range. Using a pair of 45° bends in place of a single 90° elbow (3318003) creates a \u003cstrong\u003emore gradual direction change with lower flow resistance\u003c\/strong\u003e, which is the preferred approach where the flue run permits. Each elbow deducts from the maximum permissible total equivalent flue length — consult the Ariston Next Evo X installation manual's flue duct length table before specifying.\u003c\/p\u003e\n\u003c!-- ── RED CALLOUT ───────────────────────────────────────────────── --\u003e\u003cdiv style=\"border-left:4px solid #c0392b;background:#fff5f5;padding:10px 16px;margin-bottom:14px;border-radius:0 6px 6px 0;\"\u003e\n\u003cstrong\u003e⚠ Gas Safe Installation Required — Next Evo X Range Only\u003c\/strong\u003e — All flue components must be installed by a \u003cstrong\u003eGas Safe registered engineer\u003c\/strong\u003e in accordance with the Ariston installation manual, Gas Safety (Installation and Use) Regulations 1998, and Building Regulations Part J. Flue accessories must only be used with compatible Ariston appliances and within the maximum permissible flue lengths stated in the appliance installation manual.\u003c\/div\u003e\n\u003c!-- ── TEAL CALLOUT ──────────────────────────────────────────────── --\u003e\u003cdiv style=\"border-left:4px solid #008377CF;background:#e6f4f3;padding:10px 16px;margin-bottom:22px;border-radius:0 6px 6px 0;\"\u003e\n\u003cstrong\u003eℹ 45° Pair vs Single 90° Elbow — Which Should You Use?\u003c\/strong\u003e\u003cbr\u003eA \u003cstrong\u003epair of 45° bends (3318004)\u003c\/strong\u003e achieves the same 90° total direction change as a \u003cstrong\u003esingle 90° elbow (3318003)\u003c\/strong\u003e, but with a more gradual sweep — reducing turbulence in the airflow and flue gas stream, which slightly lowers the pressure drop across the bend compared to a sharp 90°. This is particularly beneficial in longer flue runs where total resistance must be minimised. The trade-off is that two 45° bends consume more linear flue length than a single 90°. Where installation space is very limited, the single 90° elbow is the more compact option.\u003c\/div\u003e\n\u003c!-- ── STAT STRIP ─────────────────────────────────────────────────── --\u003e\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px;\"\u003e\n\u003cdiv style=\"flex:1;min-width:90px;background:#008377CF;color:#fff;border-radius:6px;padding:11px 8px;text-align: center;\"\u003e\n\u003cdiv style=\"font-size:17px;font-weight:700;\"\u003e45°\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;margin-top:3px;\"\u003ePer elbow\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;min-width:90px;background:#008377CF;color:#fff;border-radius:6px;padding:11px 8px;text-align: center;\"\u003e\n\u003cdiv style=\"font-size:17px;font-weight:700;\"\u003ePack of 2\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;margin-top:3px;\"\u003eSupplied as pair\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;min-width:90px;background:#008377CF;color:#fff;border-radius:6px;padding:11px 8px;text-align: center;\"\u003e\n\u003cdiv style=\"font-size:17px;font-weight:700;\"\u003e60\/100mm\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;margin-top:3px;\"\u003eSE coaxial\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;min-width:90px;background:#008377CF;color:#fff;border-radius:6px;padding:11px 8px;text-align: center;\"\u003e\n\u003cdiv style=\"font-size:17px;font-weight:700;\"\u003eGenuine\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;margin-top:3px;\"\u003eAriston OEM\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ── FEATURES ───────────────────────────────────────────────────── --\u003e\u003cdiv style=\"background:#008377CF;color:#fff;font-weight:600;font-size:15px;padding:10px 16px;border-radius:6px 6px 0 0;\"\u003eFeatures \u0026amp; Benefits\u003c\/div\u003e\n\u003cdiv style=\"display:grid;grid-template-columns:repeat(auto-fill,minmax(255px,1fr));gap:12px;background:#e6f4f3;padding:14px;border-radius:0 0 6px 6px;margin-bottom:22px;\"\u003e\n\u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:13px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377CF;margin-bottom:5px;\"\u003e✔ Genuine Ariston — Guaranteed Fit\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;\"\u003eUsing \u003cstrong\u003egenuine Ariston OEM flue components\u003c\/strong\u003e is essential for warranty validity, Gas Safe compliance, and safe appliance operation. The 3318004 elbows are engineered specifically for the 60\/100mm SE coaxial system, with the correct internal bore geometry, gasket seating dimensions, and material specification to match the appliance's combustion fan pressure and flue gas temperature range. Third-party 45° bends designed for other manufacturers' systems may have different internal diameters or sealing arrangements that impair combustion performance or create CO risks.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:13px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377CF;margin-bottom:5px;\"\u003e✔ Enables Flexible Flue Routing\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;\"\u003eIn many installations the straight-through route from the appliance to the external wall is obstructed by a joist, a doorframe, a cupboard structure, or a structural beam. The 45° elbow pair allows the flue run to \u003cstrong\u003estep around a single obstruction\u003c\/strong\u003e — offsetting the flue horizontally or vertically in two bends before continuing in a straight run to the terminal. Combined with extensions (3318005, 3318006), multiple offsets can be accommodated within the maximum permissible equivalent flue length stated in the Ariston installation manual.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:13px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377CF;margin-bottom:5px;\"\u003e✔ Lower Resistance Than 90° Bend\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;\"\u003eEach 45° elbow introduces \u003cstrong\u003eless pressure drop than a 90° elbow\u003c\/strong\u003e because the airflow and flue gas stream make a more gradual directional change — reducing turbulence and separation losses at the bend. In longer flue runs where the total equivalent length is close to the appliance's maximum, using a pair of 45° bends instead of a single 90° elbow can be the difference between a compliant and non-compliant flue route. The equivalent pipe length deduction per 45° bend is specified in the appliance installation manual's flue table.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:13px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#008377CF;margin-bottom:5px;\"\u003e✔ Full SE Accessory System Compatibility\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;\"\u003eThe 3318004 elbows connect directly to all other Ariston 60\/100mm SE coaxial flue components: the \u003cstrong\u003estandard horizontal flue kit (3319648)\u003c\/strong\u003e, the \u003cstrong\u003e90° elbow (3318003)\u003c\/strong\u003e, the \u003cstrong\u003e1m extension (3318005)\u003c\/strong\u003e, the \u003cstrong\u003e0.5m extension (3318006)\u003c\/strong\u003e, the \u003cstrong\u003evertical starter (3318008)\u003c\/strong\u003e, and the \u003cstrong\u003ewall bracket kit (3318015)\u003c\/strong\u003e. This allows the installer to build a complete custom flue route from a kit of standard parts without site fabrication, maintaining the sealed coaxial air\/flue separation throughout.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- ── SPEC TABLE ─────────────────────────────────────────────────── --\u003e\u003cdiv style=\"background:#008377CF;color:#fff;font-weight:600;font-size:15px;padding:10px 16px;border-radius:6px 6px 0 0;\"\u003eSpecifications — Ariston 45° Coaxial Elbow Pair (3318004)\u003c\/div\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-bottom:22px;font-size:14px;\"\u003e\u003ctbody\u003e\n\u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;width:44%;border-bottom:1px solid #c8e6e3;\"\u003eMPN\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003e\u003cstrong\u003e3318004\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eDescription\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003e45° coaxial flue elbow — standard efficiency (SE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003ePack Contents\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003e\u003cstrong\u003e2 × 45° elbows\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eFlue System\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003e60\/100mm coaxial — SE (Standard Efficiency)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eCompatible Appliances\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003eAriston Next Evo X 11 LPG (3632535) · Ariston Next Evo X 16 Natural Gas (3632533)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eCompatible Accessories\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003e3319648 horizontal flue kit · 3318003 90° elbow · 3318005 1m extension · 3318006 0.5m extension · 3318008 vertical starter · 3318015 bracket kit · 3318855 vertical flue with black terminal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;\"\u003eAriston (genuine OEM)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c!-- ── FAQ ────────────────────────────────────────────────────────── --\u003e\u003cdiv style=\"background:#008377CF;color:#fff;font-weight:600;font-size:15px;padding:10px 16px;border-radius:6px 6px 0 0;\"\u003eFrequently Asked Questions\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #c8e6e3;border-top:none;border-radius:0 0 6px 6px;margin-bottom:8px;\"\u003e\n\u003cdetails style=\"border-bottom:1px solid #c8e6e3;\"\u003e\u003csummary style=\"padding:13px 16px;cursor:pointer;font-weight:600;background:#f0faf9;\"\u003eHow much does each 45° bend reduce the maximum permissible flue length?\u003c\/summary\u003e\u003cdiv style=\"padding:11px 16px;font-size:14px;\"\u003eThe exact equivalent pipe length deduction per 45° elbow is specified in the \u003cstrong\u003eAriston Next Evo X installation manual's flue duct length table\u003c\/strong\u003e. As a general principle for coaxial flue systems, a 45° bend is typically equivalent to approximately \u003cstrong\u003e0.5–1 metre of straight pipe\u003c\/strong\u003e in terms of resistance — significantly less than a 90° elbow (typically equivalent to ~1–2m). The maximum permissible total equivalent flue length for the Next Evo X varies depending on whether the configuration is horizontal or vertical — always refer to the installation manual and calculate the total equivalent length before finalising the flue route. Exceeding the maximum equivalent length can impair combustion and compromise safety.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border-bottom:1px solid #c8e6e3;\"\u003e\u003csummary style=\"padding:13px 16px;cursor:pointer;font-weight:600;background:#fff;\"\u003eCan I use just one of the two elbows and keep the other as a spare?\u003c\/summary\u003e\u003cdiv style=\"padding:11px 16px;font-size:14px;\"\u003eYes — both elbows in the pack are identical, so if your installation only requires a single 45° direction change you can use one elbow and retain the second for future modifications or service. However, most installations that require a 45° offset benefit from using both elbows as a \u003cstrong\u003esymmetrical offset pair\u003c\/strong\u003e — the first bending the flue off-axis, an extension carrying it across the obstruction, and the second returning it to the original axis. This is the standard approach for stepping around a structural element while maintaining the overall flue direction toward the terminal.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border-bottom:1px solid #c8e6e3;\"\u003e\u003csummary style=\"padding:13px 16px;cursor:pointer;font-weight:600;background:#f0faf9;\"\u003eIs this the same as the 45° elbow for Ariston boilers (non-water heater)?\u003c\/summary\u003e\u003cdiv style=\"padding:11px 16px;font-size:14px;\"\u003eNot necessarily — Ariston produces different flue accessory ranges for different product families, and part numbers differ between them. The \u003cstrong\u003e3318004 is specifically for the Next Evo X water heater range\u003c\/strong\u003e (the SE system). Ariston boilers (E-Combi, E-System, Clas, Alteas, etc.) use different flue systems and part numbers even when the physical pipe diameter appears similar. Always match the flue accessory MPN to the specific appliance model and the installation manual's approved accessories list. Using a flue accessory from the wrong range can result in incorrect sealing, air leakage into the flue gas stream, or flue gas leakage into the room.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary style=\"padding:13px 16px;cursor:pointer;font-weight:600;background:#fff;\"\u003eDo I need any additional seals or fixings when fitting these elbows?\u003c\/summary\u003e\u003cdiv style=\"padding:11px 16px;font-size:14px;\"\u003eThe coaxial elbow joints in the Ariston SE system use \u003cstrong\u003eintegral push-fit or twist-lock connections with built-in gaskets\u003c\/strong\u003e — no additional PTFE tape, mastic, or separate seals are required at the elbow joints themselves. The gaskets are pre-fitted to the pipe sockets. However, if the elbows are fitted within a building void or concealed space, the installer should confirm all joints are correctly seated and locked before concealing the flue run — access for future inspection should be maintained where possible. Wall bracket clips (3318015) should be used to support the flue at appropriate intervals per the installation manual's guidance.\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Ariston","offers":[{"title":"Default Title","offer_id":64196164354397,"sku":"3318004","price":47.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/Ariston45DegreeCoaxialElbowPackof2mpn3318004.webp?v=1776253735","url":"https:\/\/qualityheating.co.uk\/products\/ariston-45-degree-coaxial-elbow-pack-of-2-60-100mm-se-flue-bend-next-evo-x-11-lpg-16-natural-gas","provider":"AIZO Quality Heating","version":"1.0","type":"link"}