Vessel only, or vessel + recirc kit?
Vessel only is the bare welded mash tun — for brewers replacing or expanding a hot side who already own the plumbing. Recirculation Kit adds the hardware to make it brew-ready out of the box.
Six steps. Bottom drain through every one.
A complete brew-day workflow — dough-in through CIP. The bottom drain stays in play across every step, so there's no tilting, no pickup tube to fight, and no dead spots where wort gets left behind.
Mash in — dough in over the false bottom
Strike water from the HLT lands on top of the grain bed through the recirculation supply port. False bottom traps the grain; the mash sets up over a clean slope.
Recirculate — continuous step mash
Pump pulls wort from the bottom drain, returns to the top through the recirc port. Run a programmed step mash without tilting or interrupted flow.
Vorlauf — clarify the wort
Slow the recirculation, let the grain bed filter the wort clean. Watch the sight glass on the return arm — break transfer when it runs bright.
Sparge — drain to boil kettle
Hot sparge water from the HLT enters the top while wort drains out the bottom into the Boil Kettle below. Bottom drain pulls a complete transfer with no left-behind volume.
Grain out — open the side door (15G+)
Hinged grain access door swings open. Shovel spent grain out the side; rinse the false bottom with the lid spray ball. No lifting a 60-pound grain basket out of a hot vessel.
CIP — spray + drain
Spray ball through the lid TC port pulses caustic, acid, and rinse through the vessel. Bottom drain returns to the CIP pump. Closed-loop wash, no manual scrub.
Mash tun, false bottom, every port welded in.
Hinged side grain door ships standard on 15G and larger. 10G ships without the grain door; spent grain is removed via the false bottom at that scale.
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TIG-welded mash tun — 304 stainless Fully TIG-welded, thickest walls in the industry (1.2 mm in every size). Mirror polished inside and out. Sloped bottom carries every last drop to the drain port — no tilting, no dead volume.
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Pressed stainless false bottom Fine-perforated, sized to the vessel. Sits above the welded drain; pulls a clean wort transfer through the grain bed without channeling.
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1.5" TC bottom drain port Welded at the low point of the sloped bottom and brought forward in line with the side ports. No threads, no leak points, no pickup tube. Valve not included — it’s in the Recirculation Kit.
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1.5" TC recirculation supply + return ports Side-mounted welded TC ports for the pump loop — supply on bottom, return on top. Drives recirculation and sparge in continuous flow.
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CIP port in the lid — included Welded tri-clamp port in the lid for a spray ball or steam condenser. Ready for closed-loop CIP without opening the vessel.
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Grain access door (15G, 20G, 30G, 50G) Size-dependent Hinged, welded side door. Swings open for shovel-out grain removal. Ships standard on 15G and larger; 10G does not include a grain door.
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Etched internal volume markings Stamped right into the interior wall. Read in US gallons and litres. No floating ruler to lose.
*Grain door ships standard on 15G and larger. Pricing assumes vessel-only build; Recirculation Kit priced separately.
Specs by size.
10 US gal (38 L) · 35 cm (13.8") Ø × 40 cm (15.7") H
~5 gallons finished beer
304 stainless · fully TIG-welded · mirror polished inside & out
1.2 mm · thickest in industry at this size
1.5" TC from the sloped bottom, brought forward in line with the side ports · valve in Recirculation Kit
1.5" TC supply + return · side-mount
Not included at 10G — ships standard on 15G and larger
Any 10G boil kettle · BräuPro 5G hot side
15 US gal (57 L) · 40 cm (15.7") Ø × 45 cm (17.7") H
~7.5 gallons finished beer
304 stainless · fully TIG-welded · mirror polished inside & out
1.2 mm · thickest in industry at this size
1.5" TC from the sloped bottom, brought forward in line with the side ports · valve in Recirculation Kit
1.5" TC supply + return · side-mount
Included · hinged side access
Any 15G boil kettle
20 US gal (76 L) · 45 cm (17.7") Ø × 48 cm (18.9") H
~10 gallons finished beer
304 stainless · fully TIG-welded · mirror polished inside & out
1.2 mm · thickest in industry at this size
1.5" TC from the sloped bottom, brought forward in line with the side ports · valve in Recirculation Kit
1.5" TC supply + return · side-mount
Included · hinged side access
Any 20G boil kettle · BräuPro 10G hot side
30 US gal (114 L) · 50 cm (19.7") Ø × 60 cm (23.6") H
~20 gallons finished beer
304 stainless · fully TIG-welded · mirror polished inside & out
1.2 mm · thickest in industry
1.5" TC from the sloped bottom, brought forward in line with the side ports · valve in Recirculation Kit
1.5" TC supply + return · side-mount
Included · hinged side access
Any 30G boil kettle · BräuPro 20G hot side
50 US gal (189 L) · 60 cm (23.6") Ø × 67 cm (26.4") H
~1 BBL (~31 gal) finished beer
304 stainless · fully TIG-welded · mirror polished inside & out
1.2 mm · thickest in industry
1.5" TC from the sloped bottom, brought forward in line with the side ports · valve in Recirculation Kit
1.5" TC supply + return · side-mount
Included · hinged side access
Any 50G boil kettle · 1 BBL pilot brewhouse
More DrainPro vessels.
Same architecture, same fittings, same drain. Stack the Mash Tun with the matching Boil Kettle (and HLT for a full HERMS) — they share clamps and gaskets across every size.
DrainPro Boil Kettle - Bottom-Drain Brewing Vessel
Bottom-drain boil kettle with a whirlpool port and a tri-clamp element port. 10 to 50 gal.
DrainPro Hot Liquor Tank - Bottom-Drain Brewing Vessel
Bottom-drain hot liquor tank with a removable HERMS coil. 10 to 50 gal.
DrainPro Mash Tun Recirculation Kit
Valve, return fitting and hose to recirculate a DrainPro mash tun and hold mash temperature.
Sparge Arm
Tri-clamp sparge arm that spreads sparge water evenly over the grain bed.
What our customers are saying
Real reviews from real brewers — pulled live from Judge.me.
About the DrainPro Mash Tun.
Will I be charged anything at the border?+
No. Every US order ships fully duty-paid. We clear it and prepay the duties, tariffs and brokerage before it ships, and the courier delivers it like a domestic parcel. The price you see is the price you pay.
Our guarantee: if you're ever charged import duties or fees on a Bräu Supply order, send us the receipt and we refund them, no questions.
Alaska, Hawaii and international orders are quoted before you buy — contact us.
Which size should I buy?+
10G for 5-gallon batches. 15G for 7–8 gallon batches — first size with the hinged grain door. 20G for 10-gallon batches and larger grain bills. 30G for 20-gallon double batches or pilot capacity. 50G for ~1 BBL pilot operations or taprooms running back-to-back brews. Architecture and fittings are constant across the line.
Why does the grain door only come on 15G and larger?+
The grain door is too large to fit cleanly on the 10G vessel — at that scale the side panel can't accommodate it. From 15G up, the door is sized correctly and gives you waist-height shovel-out instead of lifting spent grain over the top of the kettle.
Can I specify a custom size?+
Yes. For volumes outside the standard 10G/15G/20G/30G/50G ladder, contact us with your spec and we'll quote a custom build. Lead time is around 3 months on custom work.
Why is the bottom drain welded rather than a removable TC?+
Welded is cleaner. The single continuous pipe from vessel floor to butterfly valve has no joint, no gasket, no crevice where grain husks or yeast can lodge. It's also faster to clean — one straight bore, no fitting to disassemble. Removing the drain isn't necessary for any normal service or CIP, so the weld is the simpler, cleaner build.
Is this just for HERMS, or works for RIMS too?+
Either. The recirculation supply + return ports are TC and pump-agnostic — drive them with an external HERMS coil in your HLT, or wire a RIMS tube inline. The vessel doesn't care which method you use; both pull wort from the bottom drain and return through the top.
Can I use it with my existing brewhouse?+
Yes — it's a standalone vessel. If your existing brewhouse uses tri-clamp fittings, you're plug-and-play. If it runs on threaded NPT, you'll need a small adapter kit (TC-to-NPT 1.5"); we can include those at checkout. Pairs cleanly with any size DrainPro Boil Kettle or with a kettle you already own.
What's the difference between Vessel only and Recirculation Kit?+
Vessel only is the bare welded mash tun + false bottom + every TC port welded in — for brewers who already own valves, clamps, and plumbing. Recirculation Kit adds the hardware to plumb the vessel into a HERMS or RIMS loop: 1.5" TC butterfly valve for the bottom drain, double-clamp barb 90° recirc arm with silicone tubing, TC caps for unused ports, full clamp + gasket kit. Brew pump is sold separately — one pump can move between vessels in a multi-vessel hot side.
What ships, and when?+
Ships from our Vancouver, BC workshop. Most orders out in 5–10 days, free shipping to the lower 48. 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 the vessel, every weld and TC port, and on the controller and pump where they're included.
Heating element: 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.
Temperature probe: 6 months — it's a consumable. Gaskets, clamps and O-rings are consumables too; replacements for all of these are in stock and cheap.
Lifetime parts support on everything we build — serviced, not replaced.
The drain is
the difference.
Sloped-bottom mash tun. False bottom, welded recirc ports, hinged grain door on 15G and larger. Designed and assembled in Vancouver, BC. 2-year warranty + lifetime parts support.