DrainPro Hot Liquor Tank - Bottom-Drain Brewing Vessel
Product · DrainPro brew kettles

DrainPro Hot Liquor Tank - Bottom-Drain Brewing Vessel

Heat exchanger for HERMS. Serviceable tri-clamp coil mount.

Est. 2014
✓
304 stainless · TIG-welded · mirror polished · serviceable HERMS coil mount · sanitary 1.5" tri-clamp throughout · in stock, ships from Vancouver, BC in 1–2 days · 2-year warranty + lifetime parts.


The DrainPro HLT. Heat exchanger for HERMS — wort recirculates from the mash tun through the submerged coil, returning to vorlauf and maintain mash temperature through every step. HERMS coil mounts via compression-to-tri-clamp adapter — serviceable, replaceable, no permanent welds.


304 stainless vessel, fully TIG-welded, mirror polished inside and out. Sanitary 1.5" tri-clamp throughout — interchangeable with any vessel in your hot side and any commercial brewery. ULWD element port mounts any standard tri-clamp element. Bottom drain for water transfer and full vessel cleanout.


Available 10G / 20G / 30G / 50G. For brewers building a three-vessel HERMS, specifying a matched HLT into an existing tri-clamp brewhouse, or running as a dedicated hot water reservoir. Designed and assembled in Vancouver, BC. Ships tariff-free to the USA.



 

Step 1 — Choose your size 10g
$642.00Ships from Vancouver, BC · rates calculated at checkout or 4× $160.50
with Shop Pay Installments
→
Ready to ship · most orders out in under a week
2y
2-year warranty · lifetime parts · every part replaceable
✉
Talk to a brewer, not a sales rep · email or call — real humans
Step 1 — Configuration

Vessel only, or vessel + Heat Exchange Kit?

Vessel only is the bare welded HLT — for brewers replacing or expanding a hot side who already own the plumbing and coil. Heat Exchange Kit adds the HERMS coil + hardware to make it HERMS-ready out of the box.

How the HLT works

Six steps. Strike water through sparge.

The HLT carries two roles across a HERMS brew day: hot water reservoir for strike + sparge, and heat exchanger for the mash recirculation loop. The bottom drain handles all liquid transfer; the HERMS coil mount accepts a serviceable, replaceable coil for mash temperature control.

Step 1

Fill — charge with brewing water

Fill through the lid TC port (or a hose through the top). Etched internal markings let you target volume to within a half-gallon by eye.

Step 2

Heat — ULWD element brings strike

1.5" TC element port fits any standard tri-clamp ULWD element. Heat to your strike temperature for the grain bill, then hold.

Step 3

Strike — dose the mash tun

Drain measured strike water through the bottom TC drain into the mash tun. Gravity-feed if the HLT is elevated, or pump if it sits on the floor.

Step 4

Step mash — HERMS heat exchange

Mash wort pumps from the mash tun into the submerged HERMS coil, returns to the mash tun at HLT temperature. The HLT element holds water temperature; the coil holds the mash temperature through programmed steps.

Step 5

Sparge — feed the mash tun

Slow draw through the bottom drain into the mash tun for fly sparge. Volume tracks down the etched markings as you go.

Step 6

CIP — spray + drain

Bottom drain pulls the final rinse out cleanly. Spray ball through the lid TC port if you want closed-loop CIP — same chemistry as the mash tun and boil kettle.

What's included

HERMS-ready when configured.

Heat Exchange Kit adds the HERMS coil + plumbing hardware. Compression-to-tri-clamp coil mount means the coil is serviceable and replaceable — no permanent welds inside the vessel. Vessel only is for brewers replacing an existing HLT and bringing their own coil + hardware.

DrainPro HLT — vessel only
  • ✓
    TIG-welded HLT — 304 stainless Fully TIG-welded, thickest walls in the industry (1.2 mm on 10G/15G/20G, 1.5 mm on 30G/50G). Mirror polished inside and out. Sloped bottom carries every last drop to the drain port — no tilting, no dead volume.
  • ✓
    1.5" TC bottom drain port Welded at the low point of the sloped bottom and brought forward in line with the side ports. Doubles as the CIP return path. Valve not included — it’s in the Heat Exchange Kit.
  • ✓
    1.5" TC element port · side mount Welded TC ferrule sized for any standard tri-clamp ULWD element. Drop in, clamp down, plug controller.
  • ✓
    Compression-to-tri-clamp HERMS coil mount Bulkhead port sized for a tri-clamp HERMS coil. The coil bolts in via compression-to-TC adapter — serviceable, replaceable, no permanent welds inside the vessel.
  • ✓
    CIP port in the lid — included Welded tri-clamp port in the lid for filling, sight-checking, or CIP spray ball mount.
  • ✓
    HERMS coil + element + 4 valves + dip tubes + caps + clamps + gaskets In Heat Exchange Kit Not included with Vessel only — bring your own coil, element, and plumbing. The Heat Exchange Kit bundles the size-matched HERMS coil (small for 10G/15G/20G, large for 30G/50G), 2× compression-to-TC coil adapters, 5,500W ULWD brewing element, 4× 1.5" TC butterfly valves, 2× press-in dip tubes, 2× TC blank caps, and 7× TC clamps + gaskets.
  • ✓
    Etched internal volume markings Stamped right into the interior wall. Read strike + sparge volumes by eye.

*Heat Exchange Kit bundles a 5,500W (240V) ULWD element. 50G vessel is dual-element capable; current HERMS controller is single-element, so the kit ships with one element. Power cord ships with the HERMS controller, not with the element. Pricing assumes vessel-only build; Heat Exchange Kit priced separately ($599 small coil for 10G/15G/20G · $639 large coil for 30G/50G).

Technical specifications

Specs by size.

Specs for:
Volume · dimensions

10 US gal (38 L) · 35 cm (13.8") Ø × 40 cm (15.7") H

Recommended mash

~5 gal mash · strike + sparge

Element port

1.5" TC · sized for 240V (5,500W) ULWD

Material

304 stainless · fully TIG-welded · mirror polished inside & out

Wall thickness

1.2 mm · thickest in industry at this size

Bottom drain

1.5" TC from the sloped bottom, brought forward in line with the side ports · valve in Heat Exchange Kit

HERMS coil mount

Compression-to-tri-clamp · serviceable, replaceable

Lid CIP port

1.5" TC · spray ball mount · included on every kettle

Pairs with

10G Mash Tun + 10G Boil Kettle

CA
Canadian company · CAD pricingShips Canada-wide from Vancouver, BC
2y
2-year warranty · lifetime partsEvery part replaceable
14
Hand-built in Vancouver, BCSince 2014 · we invented the single-vessel electric brewhouse
✉
Talk to a brewer, not a sales repReal humans · email or call
Build the rest of the hot side

More DrainPro vessels.

Same architecture, same fittings, same drain. Pair the HLT with the matching Mash Tun + Boil Kettle for a full HERMS hot side — clamps and gaskets carry across every size.

Common questions

About the DrainPro HLT.

Do I really need a separate HLT?+

For full HERMS or RIMS architectures, yes — the HLT both holds your strike + sparge water and acts as the heat exchanger for mash temperature control via the submerged coil. For single-vessel or BIAB workflows, the HLT is optional. Brewers running step mashes or controlled fermentation profiles benefit most from the dedicated heat exchanger.

Which size should I buy?+

Match the HLT size to your mash tun — a 20G mash tun pairs with a 20G HLT, etc. Sparge water volume runs roughly equal to mash volume, with headroom for strike. 10G for 5-gal batches, 15G for 7–8 gal, 20G for 10-gal, 30G for double-batch days, 50G for ~1 BBL pilot.

Why a serviceable HERMS coil mount?+

Most HLTs in the market ship with the HERMS coil permanently welded inside — when it fouls, scales, or fails, the entire vessel is dead. The DrainPro HLT uses a compression-to-tri-clamp coil mount: the coil bolts in via a compression-to-TC adapter, with no permanent welds. Pull it out for inspection or cleaning, swap it for a different coil geometry, or replace it years down the line — the vessel itself outlives the coil.

How does the HERMS coil mount work?+

The HLT ships with a bulkhead port sized for a compression-to-tri-clamp adapter. The HERMS coil bolts in through that adapter — no permanent welds inside the vessel, no proprietary fittings. The coil is fully serviceable: pull it out for cleaning or replace it without affecting the vessel itself. Coil + adapter included in the Heat Exchange Kit.

What's the difference between Vessel only and Heat Exchange Kit?+

Vessel only is the bare welded HLT with every TC port welded in — for brewers replacing an existing HLT who own a HERMS coil, element, and plumbing already. Heat Exchange Kit adds everything to run a HERMS brewhouse: size-matched HERMS coil (small for 10G/15G/20G, large for 30G/50G), 2× compression-to-TC coil adapters, 5,500W ULWD brewing element, 4× 1.5" TC butterfly valves, 2× press-in dip tubes, 2× TC blank caps, and 7× TC clamps + gaskets.

Is the element included?+

Yes — in the Heat Exchange Kit. The kit ships with a matched 5,500W ULWD brewing element, sized for 240V. Vessel only buyers should source their own TC element. Power cord ships with the HERMS controller, not with the element.

What ships, and when?+

Ships from our Vancouver, BC workshop. Most orders out in 5–10 days, free continental US shipping. 10G, 15G and 20G ship via standard courier; 30G and 50G ship LTL freight (palletized, with tracking and a delivery appointment).

What's the warranty?+

2-year warranty on every weld and TC port, and the Heat Exchange Kit valves and HERMS coil (when bundled). Element (Heat Exchange Kit): 2 years against defects. Not covered: dry-firing (running the element without liquid covering it), and heat or melt damage at the twist-lock plug from a loose or improper connection — a proper, fully seated connection has to be maintained. Gaskets, clamps and O-rings are consumables; replacements are in stock and cheap. Lifetime parts support on everything we build — serviced, not replaced.

Still have questions? Talk to a brewer, not a sales rep. Email or call us during business hours (Pacific time).

The drain is
the difference.

Heat exchanger for HERMS. Serviceable compression-to-tri-clamp coil mount. Designed and assembled in Vancouver, BC. 2-year warranty + lifetime parts support.

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