Decided to give my 10gal h&g boiler a go today, the boiler after adding 2 more heaters and a ball valve tap was ready to go mashed as all ways except a lot more grain all seemed well till sparging my manifold keeped blocking

never had a problem with 5gal brews eventully got through the sparge and on to the boil the boiler was great until drain time the h&g supplied manifold is crap ! didn,t even get a litre out before blocking not happy waste of money ! after much messing eventully drained the boiler to find as a result of all the probs my effiency was down to 74% from my usual 80%
Just wait now to see if the guiness is ok.
Dan