For over a decade, water purveyors and backflow testers have relied on the peak performance of Acugauge® backflow testing equipment. The innovative designs of the 521 and 521G have made them the backflow preventer test kits of choice among industry professionals.
You, too, can be a Pro by trying either model risk-free for 30 days.

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Acugauge® wants you to shop with confidence. We manufacture and sell quality backflow test kits at competitive prices and we back our prices with a full price protection guarantee.
Acugauge® Price Comparison Guarantee - Price Protection Before The Sale
If you see a new Watts or Mid-West backflow test kit advertised for less than than the price of our Model 521G, not only will we match that competitor's price, but you will also receive a certificate valid for one FREE Re-Calibration Service.
Acugauge® Price
Protection Guarantee - Price Protection After The Sale
If you purchase a backflow test kit from Acugauge® and see a new Watts or Midwest backflow test kit advertised elsewhere at a lower price within 30 days of your purchase, Acugauge® will gladly refund you the difference.
RULES
If you purchase a Watts or Midwest backflow test kit elsewhere from an authorized backflow test kit dealer and you want to claim your FREE Re-Calibration Service, you must provide us with a copy of a verifiable sales receipt. To make a claim under these guarantees, simply email us at refunds@Acugauge®.com or call us at 1-888-521-521G(4).The price and backflow test kit to be matched must be verifiable on the Internet or through a current printed advertisement provided by you, and in-stock for same-day or next-day shipment by an authorized backflow test kit dealer. The competitor's advertisement must be current, with price adjustments limited to one price match per item. For competitive comparison, prices must include, purchase price, shipping and handling charges and tax. All purchases and prices must be verifiable with authorized backflow test kit dealers. This guarantee cannot be combined with any other offer, promotion or discount.
Acugauge® No-Questions-Asked Guarantee
Acugauge® wants you to shop with
confidence. If you are not 100% satisfied with your Acugauge® Backflow Test Kit
for any reason, simply contact us for a Prepaid Return Shipping Label and Return
Merchandise Number (RMN), then return the following items to us within 30 days
from date of purchase for a complete refund of your purchase price and original
and return shipping:
1. Your receipt, email confirmation or invoice with RMN printed thereon;
2. The reason for your dissatisfaction - this helps us improve our product or
service;
3. Backflow Test Kit and all accessories and cases in an un-damaged,
un-blemished, like-new condition;
Your refund will be promptly processed. No questions
questions asked.