They do not stand by thier product. Even when it's not working as shipped!
The DD-1A is garbage. I do not get constant flow. It pulses. Even when set on 6L, it only puts out less than 2L actually. They refuse to exchange it. The phone number for 'service' is bogus. You can only converse with them thru email and it takes a couple of days for an answer. I will never buy from these rip offs again.