Refunds and Returns


Our REFUND AND RETURN policy allows you 30 days to return the kit for a refund, as long as it has NOT been installed or parts used in anyway. If more than 30 days have gone by since your purchase, you are no longer eligible for a refund or exchange.

Your 30 day cycle begins when kit is delivered to your door, so make sure you open it immediately and check the packing list for any missing or broken parts and notify us immediately if you find anything wrong upon opening the package. After 30 days the kit may no longer be returned except for warranty work or replacement.

To be qualify for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging, and you must call or email to get an RMA# to return it. We do not pay for return shipping. A 10% Restocking Fee is charged for all returns. Shipping costs are not refunded.

To complete your return, we require a receipt or proof of purchase, or an order number.


Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund. Upon Approval, your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days, LESS a 10% restocking fee.

Late or missing refunds (if applicable)
If you haven’t received a refund yet, first check your bank account again.
Then contact your credit card company, it may take some time before your refund is officially posted.
Next contact your bank. There is often some processing time before a refund is posted.
If you’ve done all of this and you still have not received your refund yet, please contact us at

Sale items (if applicable)
Only regular priced items may be refunded, unfortunately sale items cannot be refunded.

Exchanges (if applicable)
We will only replace items if they are defective or damaged. If you desire to exchange it for a larger generator or upgrade your system (only BEFORE it is installed- within the 30 day return period), send us an email requesting the exchange at We will invoice you or refund for the difference in size. You will send your item to: Transitional Technologies, LLC, 671 Willow Pass Road Unit 1, Pittsburg California US 94565.

If the item was marked as a gift when purchased and shipped directly to you, you’ll receive a gift credit for the value of your return. Once the returned item is received, a gift certificate will be mailed to you.

If the item wasn’t marked as a gift when purchased, or the gift giver had the order shipped to themselves to give to you later, we will send a refund to the gift giver and he will find out about your return.

To return your product, you should mail your product to: Transitional Technologies, LLC, 671 Willow Pass Road Unit 1, Pittsburg California US 94565. Make sure you acquire an RMA number from us first.

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.

Depending on where you live, the time it may take for your exchanged product to reach you, may vary.

If you are shipping an item over $75, you should consider using a traceable shipping service or purchasing shipping insurance. We don’t guarantee or insure that we will receive your returned item.

Every effort is made to construct quality Hydrogen Generators, Filters, Reservoirs and other items. The items are checked and tested before being packaged and shipped. We guarantee our hydrogen generators will operate as as efficient hho gas generators and will continue to work well as long as properly installed, maintained and flushed/cleaned on a regular basis.

If you have installed the kit in your car, you may NOT return it for any reason EXCEPT warranty repair- no refunds issued after installed in vehicle or used in any manner.

If the generator is broken, leaks, or does not produce HHO gas, contact us for a replacement. We will fix or repair it for up to five years after purchase for the cost of shipping only. We do not accept returns based on mileage results because we have no control over the quality of the installation or the type of vehicle it is put into. Warranty does not cover breakage or damage caused by customer, installation or abuse. It is up to our discretion to prorate repairs if we decide that the unit was not installed properly or was damaged due to poor installation or misuse/abuse of unit.

If the generator is used in below freezing conditions, it is required to increase the density of the electrolyte mixture to prevent the water from freezing. If the customer does not do this prior to a hard freeze, the generator may freeze and break the case, warping the metal parts inside, and ultimately voiding the warranty. 

We do NOT accept returns based on customers perception or measurement of production level of hho gas. We measure our units after many break in hours and using a Dwyer lab grade gas/air flow meter, which may or may not match up with customers method of measurement. We do not compare our gas/flow measurements with those of an upside down plastic bottle in water. No returns are accepted by reason of production level, or measurement by customer, as we have no control over the parameters.

Hydrogen Generators must be maintained on a normal basis. If you notice a reduction in performance, this is not a defect or an indication it is broken. It simply indicates it is time to drain the electrolyte, flush it with clean water and refill with fresh distilled water and electrolyte - do NOT send it back until you have performed a maintenance cycle on it. Follow other maintenance recommendations in the instruction manual to keep generator at optimum performance. You can purchase our easy to use, Hydro-Gen Eco-Cleaner here.