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Frequently Asked Questions

If someone has 110 volts available, even with a long extension cord the VM4BS500 is the way to go. Nothing beats the 500 watts of power that it offers with the exception of the 4.0 Peak HP VAC N BLO. Bottom line, I still push 110 volts over 12 volts. The 12 volt AM4BS comes in handy when 110-volt AC outlets are just not available (apartment/condo owners). As 12-volt cigarette lighter adaptor models go, this is the best. The vacs look identical with the exception of the motor and cord. VM is 110 volt and AM series is 12-volt. Both models also have the same MSRP.
Unfortunately, we have NO cordless vacs. They are not powerful enough and don’t have long enough run time. Maybe you can use a very long extension cord with any of the following products.
No, all of our vacuum cleaners are designed for DRY pick up only.
Every product we ship has a date code on it (usually on the bottom) indicating month and year it was built.
The cloth bag must be used in conjunction with the paper bag. You can continue to use the paper bag or just use the cotton cloth bag. Users don’t necessarily have to use the paper bags although it is a lot more sanitary to dispose of the paper bags than the “shake out the dirt” from the cloth bag. We also recommend that you continue using paper bags he 3 ply paper bags helps to prevent dust from entering the motor end environment.
To maximize the blowing power; remove the front end cap and cloth bag, leave the foam filter in place and leave it wide open. Do not replace the front end cap. The VAC N BLO is designed to blow water out
of hard to reach inaccessible areas of your vehicle. It is not capable of drying your entire car. You'd need the master blaster for that.
Unfortunately, we don't carry the adaptors. We suggest you bring the fan to a local RADIO SHACK. The cord that they supply should have a built in fuse, as well. They should be able to help you.
The Master Blaster features two twin fan 4.0 Peak Horse-power motors capable of delivering up to 58,000 feet-per-minute of clean, dry, warm, filtered air! Each motor is controlled by a separate switch that allows you to select from three different airflow and temperature levels up to 60º above ambient. If you use ONLY the FRONT motor, you’ll get one level of blowing power and heat. If you use ONLY the BACK motor, you’ll get another level of blowing power and heat. The truth is that these two scenarios above (of operating one motor at a time) are not really dramatically different.
You can use the front independently or the rear, it doesn’t make a difference.
The heat produced is directly related to the temperature that the unit is being used in. If it's a really hot day, it'll get real hot. If it's 65, you'll get maybe 115-125, or so.
Due to the tremendous velocity of air produced by our products, you may experience some air venting by the seams, this is completely normal and helps keep the unit running efficiently.
Besides our facility, we do have a few places we can recommend for repairs:
Midwest Grooming Supplies & Service
28686 W. Northwest Highway
Lake Barrington, IL 60010
CJ’s Grooming Tools, Inc
3241 Shallowford Road
Atlanta, Georgia 30341
Sharp Time Sharpening Service
3524 Cameron Creek Drive
Matthews, NC 28105
Ryan's Pet Supplies
1805 E McDowell Road
Unscrew the hose cuff off clockwise; Cut 1” off the raw spiral hose; Screw the cuff on counterclockwise
Occasionally, we will receive calls from users saying that their MASTER BLASTER & BLASTER HOSE is defective. 99.99% of the time it is not. We don’t glue one of the hose ends on the 10 or 30-foot hose to provide greater flexibility in adjusting the air flow. There are times that the hose end will come “unscrewed”.
The hose is not defective. The hose end came off.
You may have purchased a 120-volt product and are running at 220-240 volts. We do indeed manufacture 220-240 volt units that are suitable for use in your country. We don’t recommend the use of transformers.  You would need a new motor and new cord. By the time you get done with the cost of the components and shipping costs you may be better off ordering a NEW correct 220-240-volt product from one of our suppliers.
Please be sure you are not using spaces or dashes in between the cc numbers. If the problem continues, please call your bank to make sure they are not blocking the transaction.
The power control slide located on the hose end can be used to reduce suction or blowing power.
Our units have been known to run hot. It is completely normal, however, if the heat is excessive, please call customer service. You should always make sure that his dust bag is not too full and their filter is clean.
Please contact the company you originally purchased your item from for a replacement or refund.
If you receive a damaged or defective item or are missing parts, please contact MetroVac within 5 business days of delivery at or 800-822-1602. Please keep all original packing materials and cartons available for repacking a return, if that becomes necessary. We will make every effort to quickly resolve the problem to your satisfaction. Our staff is fully trained to offer any assistance to help you. Our excellent packaging and shipping record are an indication of our commitment to reduce damage incidents.
To return items your purchased through one of distributors or dealers, please contact the company you made the purchase from directly.
If for any reason you are not satisfied with your MetroVac product, you may return it in its original packaging within 30 days of receipt for a refund. All returns and exchanges require a Return Authorization Number. Please email our customer service department for your Return Authorization Number. The return email will give you instructions where to return the merchandise.
The VAC N BLO is a phenomenal vacuum cleaner for detailing your car. The compact size and awesome suction power makes quick work of cleaning carpeting and upholstery. The blower feature on the VAC N BLO will certainly clear water from door jambs, seams, and other hard to reach areas. If you want to dry an entire car in 15 minutes or less I would recommend the MASTER BLASTER. You can see it in action here
Master Blaster is the most powerful car dryer we manufacture and will dry most cars in 15 minutes or less without using a towel, chamois or microfiber.
Filters should be changed when dirty or monthly.
Bags should be changed when full or a drop in suction.
Carbon brushes should be changed ideally every 500 hours of use.
Typically, 2 weeks or sooner.
Yes, the customer is responsible for all shipping costs for machines being sent back for repair or maintenance.
For all repair and maintenance work, please read, fill out and follow the instructions here:
Each products warranty information can be found on the product page.
To become a distributor/retailer/dealer please fill out and send this form or send an email to Please specify which product line you are most interested in.
Canadian and International orders need to be called in or emailed - or send an email to
Any orders shipping to an APO, FPO or PO Box must be called or emailed in - or send an email to As UPS does not deliver to any of these, you will be quoted a cost for shipping via USPS.
Online orders can be paid for using Visa, Mastercard or American Express.  If you wish to pay for an order using a personal check, bank check or money order, please read our policy for mail-in orders
Typically, orders take 1-5 business days to ship out of our warehouse. Transit times vary.
Oakland, NJ 07436
As the manufacturer we don’t compete on price with our resellers.
Proposition 65 (Prop 65) is the original name for the initiative that became California’s Safe Drinking Water and Toxic Enforcement Act of 1986. This law was enacted directly by California’s voters when it appeared as an initiative on an election ballot. The law is administered by OEHHA, which is a part of the California Environmental Protection Agency (Cal/EPA).
For substances that are listed as causing cancer, the “safe harbor” level is called a “no significant risk
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