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Grainfather G70

Regular price £1,000.00 GBP
Regular price £1,499.00 GBP Sale price £1,000.00 GBP
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Tax included. Shipping calculated at checkout.
Here’s to the brewers who are pushing boundaries and raising the bar. The perfect ½ barrel Smart Brewing System for homebrewers on the verge of their dreams and, commercial breweries who are looking to bring authenticity back to their pilot batches. The Grainfather’s award-winning innovation and quality in a larger capacity with app integration and smart brewing technology. Compatible with our Conical Fermenter and Glycol Chiller for the ultimate advanced brewery setup. Program recipes directly to the G70 Smart Controller and run your brew session from the Grainfather App. When connected to the Grainfather App, you can access a suite of brewing tools, recipes and calculators, which you can take with you wherever you go. 

Max & Min Grain Bill:

The G70 system is designed for brewing larger batches. The 70L maximum preboil volume and 17kg maximum grain bill allows you to make enough wort or beer of any style as a pilot test batch or to share with your friends/ homebrew club. With the standard pipework, a minimum batch size volume of 40L and a 8kg grain bill is required to ensure the overflow pipework is engaged during mashing which allows for the most accurate and stable mash temperature management. With the micro pipework, a minimum batch size of 30L and 5.5kg grain bill is required for optimum function. For batches smaller than these our G30 Brewing System is optimised for batches up to 28L.

Large Counterflow Chiller:

Water conservation is a serious concern for us at Grainfather and this is one of the primary reasons, counterflow chillers come standard with our brewing systems. To further our efforts in conservation we elected to use copper rather than stainless steel. This is because copper can have up to 20 times greater thermal conductivity than stainless steel, allowing our counter flow chiller to use less water over shorter transfer times. Copper has a long history in brewing and is relatively inert in wort and beer.

Cross Section G70 Base:

The heating element spans 80% of the base for optimal, even heating and the conical shaped floor allows for maximum yield of wort.

Expected Mash Efficiencies:

Depending upon your grain crush, we typically see mash efficiencies of between 72-82%. The efficiency on the equipment profile is pre-set to 80%, however, as expected with any brewing system if you are brewing at the upper limit of the grain bill you can expect the mash efficiency to drop a couple of points. At the minimum ranges of the grain bill a slight increase in mash efficiency can be observed due to the increased surface area exposure of the grains in the grain basket.

Boil Off & Losses: 

The boil off rate for the G70 is 3.5L per hour. The loss from the G70 unit is 3L and a further 2L loss can be expected if you don’t reclaim any wort from the counterflow chiller.  

Maximum Safe Flow Rate:

The maximum safe flow rate for the water and wort are 6 and 3L per minute respectively. However, your ground water temperature is the rate determining factor. We recommend setting the water to between 4 and 6L per min and start reducing the wort flow from 3L per minute until the desired wort out temperature is reached.  

Tech Spec:

  • Height: 83cm
  • Width: 53cm
  • Material: 304 Stainless Steel
  • Capacity: 70L
  • Batch Volume: 65L Max - 40L Min.
  • Grain Weight: 17kg Max - 8kg Min.
  • Boil-Off Rate: 4L
  • Pump Power: 32w 
  • Boil-Off Rate: 4L Per Hour
  • Mash Tun Dead Space Volume: 6.8L


Delivery / Despatch Times
  • All orders placed before 1pm will be dispatched the same day, although we will strive to dispatch all orders as soon as possible.
  • We use Royal Mail 48 Tracked for most orders, although also use FedEx for next day delivery if chosen at checkout and also for some of our bigger orders.
  • Shipping time might vary depending on location and other factors.
  • If you require any items in a hurry, please get in contact and we will see what we can do to accommodate this.

Delivery Prices

  • Orders over £60 will have free shipping, although next day will accrue a £1.99 charge.
  • Orders under £60 will be charged for shipping depending on your chosen delivery method and country. Full price will be displayed at checkout.

Delivery Weight

The delivery cost is affected by this factor and broken down below:
  • Up to 250g - £2.99
  • 251-500g - £3.99
  • 501g-5kg - £5.49
  • 5kg-15kg - £6.99
  • 15kg and over £7.99
Please note that the cost for the channel islands up to 5kg is £5.49 due to increased costs for smaller items.
Order Tracking
All orders, once dispatched, will be sent a tracking number. This can be used on the royal mail website to track your order. If your order is sent using FedEx, you can click on the tracking number sent on dispatch and this should take you through to the FedEx website containing all relevant information.
If there appears to be any issues with your order, please use the chat provided in the first instance, as they can better help with your queries. If you still are having issues, please contact us at and we will try our best to resolve any issues as soon as possible.

Refunds & Returns

Thanks for shopping at Brewco Brewing LTD.

If you are not entirely satisfied with your purchase, we're here to help.


You have 30 calendar days to return an item from the date you received it.

To be eligible for a return, your item must be unused and in the same condition that you received it.

Your item must be in the original packaging.

Your item needs to have the receipt or proof of purchase.


Once we receive your item, we will inspect it and notify you that we have received your returned

item. We will immediately notify you on the status of your refund after inspecting the item.

If your return is approved, we will initiate a refund to your credit card (or original method of payment).

You will receive the credit within a certain amount of days, depending on your card issuer's policies.

You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable.


If you receive a refund, the cost of return shipping will be deducted from your refund.

Contact Us

If you have any questions on how to return your item to us, contact us.

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