Majestic

HHT 12" (305mm) pipe length SLP12

SKU / Model: SLP12

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HHT 12" (305mm) pipe length SLP12

Product overview

The HHT SLP12 is a 12" (305 mm) straight pipe section in the SLP direct vent system (4" inner / 6-5/8" outer). It is used to build the vent run between an approved gas appliance and its termination cap. It is a venting component, not a fireplace.

Majestic manuals that list SLP pipe include the Quartz 32/36/42 IFT (top-vent configurations specify SLP series components only) and Jade 32/42, which is approved for HHT SLP venting systems. Confirm your exact model's venting section before ordering.

Specifications

Manufacturer part number SLP12
Vent system HHT SLP, 4" inner / 6-5/8" outer
Nominal / actual length 12" (305 mm)
Effective length 12" (305 mm)
Rise/run at 45° 8-1/2" (216 mm)
Finish Standard (black-painted version: SLP12-BK)

Installation and safety notes

Follow the appliance manual for vent length, rise/run limits, clearances to combustibles, firestops and supports. HHT warns not to mix pipe, fittings or joining methods from different manufacturers.

In power vent installations (PVLP-SLP, PVV-SLP, PVI-SLP-B) all outer pipe joints must be sealed with silicone or aluminum foil tape rated to at least 300°F.

Exact-model manuals and downloads

Majestic Quartz 32/36/42 IFT Installation Manual, 2641-980 Rev N, 11/25: p.18 lists SLP12 effective length 12" (305 mm) and 45° rise/run 8-1/2" (216 mm); p.15 approves HHT DVP or SLP venting.

HHT Approved Vent Components (French edition, Composants de l'évacuation approuvés), 2583-983BFR, 11/23: p.8 SLP pipe table lists SLP12.

Majestic Jade 32/42 Installation Manual, 2619-986 Rev AD, 8/26: p.26 SLP effective-length table.

Frequently asked questions — SLP12

What size is SLP pipe?

SLP is HHT's 4" inner / 6-5/8" outer direct vent pipe; the PVLP-SLP manual lists SLP as 4"/6-5/8" and DVP as 5"/8".

What is the effective length of SLP12?

The Majestic Quartz IFT manual lists SLP12 with an effective length of 12" (305 mm) and a rise/run of 8-1/2" (216 mm) when installed at 45°.

Which Majestic fireplaces use SLP pipe?

Examples from the manuals: Quartz 32/36/42 IFT top-vent configurations (SLP series components only) and Jade 32/42 (approved for HHT SLP venting systems). Check your model's venting section.

Can I mix it with another brand's pipe?

No. HHT manuals state not to mix pipe, fittings or joining methods from different manufacturers.

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