PROBLEMS WITH NEAUTRALIZER. MARRIED GAS & SOLID FUEL TOGETHER USING A NEAUTRALIZER.ALL PIPED AS PER MANUFACTURERS INSTRUCTIONS EXCEPT FOR CIRCS ON SOLID FUEL WHICH ARE 22MM INSTEAD OF 28MM.ALL WORKS FINE , EXCEPT FOR RETURN CIRC WITH GRAVITY. HAVE CHECKED THE COIL,THATS CLEAR.ALSO DRAGGED IT THROUGH ON RETURN.BUT IT WONT CIRCULATE BACK THROUGH NEAUTRALIZER.ANYONE ANY EXPERIENCE OF THIS SETUP.SORRY FOR SHOUTING.NOT VERY GOOD ON COMPUTERS.