How long will it take to receive my order?

Typically, it takes 3–5 business days to process your order, and 7–20 business days for international delivery depending on your location. We're doing our best to ensure prompt delivery.

How to track my order?

Please track your order at our Tracking page https://piherk.com/a/ordertrack

Where do you ship to?

We currently ship to the United States, United Kingdom, European Union, South Korea, Singapore, Japan, Australia, and select other international destinations.

Didn’t receive your order?

Make sure to track it on our Tracking page. Still have questions? Just email us at support@piherk.com.

What if my package is damaged during shipping?

Please inspect your package upon delivery. If you notice any damage:Take photos of the packaging and damaged product.If the damage is severe, refuse the package and contact us immediately.Email support@piherk.com within 48 hours with photos and details.

Shipping fees are calculated based on your destination and package weight:Standard Shipping: $8 USDExpedited Shipping: $15 USDFree shipping is available for orders over $79 USD

What shipping methods do you use, and how long does delivery take?

We ship international orders via DHL, FedEx, or other reliable couriers. Delivery time is usually 7–20 business days, depending on your location.

What is your return policy?

We offer a 30-day return policy. You can request a return within 30 days of receiving your item.To be eligible, the item must be:Unused, in original condition with tags and packagingAccompanied by proof of purchasePlease check our return/refund policy here.

What are my return rights in the European Union?

If you're in the EU, you have the right to cancel or return your order within 14 days of receipt — for any reason — as long as the item is in original condition with proof of purchase.

What items are non-returnable?

We do not accept returns on the following:Perishable goods (e.g., food, flowers)Custom or personalized itemsBeauty/personal care itemsHazardous materials or flammable productsGift cards and final sale itemsProducts damaged due to misuse

Can I exchange an item?

Yes, you can exchange an item for a higher-priced item or the same item in a different size. To do so, please return the original item first. Once your return is approved, you can place a new order for the replacement.

How do I start a return?

Please contact us at support@piherk.com to request approval before returning any item.Returns without prior approval will not be accepted. More details of our return policy

Who pays for return/exchange shipping?

Customer pays return/exchange shipping (typically $25) unless the item is defective or incorrect.We recommend confirming the return address and shipping method before sending.

When should the sealing ring be replaced?

Replacement is recommended in the following cases:When it shows visible wear, aging, or hardening;If you notice air leakage during use;As a general guideline, inspect it every 6–12 months depending on usage frequency.

Do I need tools to install the pressure regulator?

No tools are required. Our regulators use a soft-seal structure, so you can simply tighten them by hand. Using a wrench or other tools may over-compress the sealing ring and cause leakage.

How do I clean the regulator?

Wipe the exterior with a dry or slightly damp cloth. Do not immerse in water or use harsh chemicals.

How to choose the right thread for CO₂ cylinders?

Cylinder thread specifications vary by country, region, and application. Common CO₂ cylinder threads include:CGA320 – Commonly used in USA and Canada for industrial CO₂ cylinders. In Australia, this thread is also commonly used for soda maker cylinders.W21.8 – Common in Europe and the UK; sometimes referred to as BS341 No.6 / DIN477-6.G5/8 – Common in China and other parts of Asia.Tr21×4 – Often used in home soda makers.JIS M22-18 – Common in Japan and Korea, similar in size to W21.8 but not directly interchangeable.Important Notes:Thread standards differ by application: industrial CO₂ cylinders vs. home soda machines.W21.8 and JIS M22-18 threads are similar but cannot be used interchangeably; always verify the cylinder thread before use.Always check your cylinder and device specifications to ensure compatibility.

Will there be any color difference between the product photos and the actual item?

All products are photographed from actual items without excessive rendering, aiming to show the true appearance and surface finish. Due to lighting and display variations, there may be slight color differences between the photos and the actual items. In addition, metal products may have minor scratches or imperfections. Please understand and take this into consideration before placing your order.